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In this paper, we consider the problem of channel estimation Pioneering research papers have shown that the inevitable for large scale Multiple-Input Multiple-Output (MIMO) problem of pilot overhead drawback can be resolved by systems, in which the main challenge that limits the Compressed Sensing (CS) approaches. (...) Thus, in this paper, we propose a novel channel estimation technique Keywords - Channel estimation, massive MIMO, based on SBL to reduce the pilot overhead of massive semidefinite programming, sparse Bayesian learning MIMO systems. (...) While the massive employed pilots to reduce the pilot overhead. MIMO system has been investigated in (TDD) mode, since the The remainder of this paper is organized as follows.
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Score: 1125068.8 - https://www.itu.int/en/publica...s/files/basic-html/page85.html
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Hence, an additional overhead of 2 bytes has to be taken into account. Currently, we do not believe that the byte stream format would be useful over H.324/M links, and hence this additional overhead is not used in this argumentation. (...) For progressive-scan-only systems this implies an overhead of one bit per P-slice, which is believed to be acceptable. (...) Hence, the additional overhead per slice is probably somewhere around 8 bits.
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Score: 1123476.5 - https://www.itu.int/wftp3/av-a...002_07_Klagenfurt/JVT-D066.doc
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 Page 757 - 5G Basics - Core Network Aspects           Basic HTML Version Table of Contents View Full Version Page 757 - 5G Basics - Core Network Aspects P. 757 Transport aspects 2 Table 9-21 – Derived framing parameters Parameter Definition fDMT Symbol rate of transmission expressed in Hz as specified in clause 10.4.4 (same for upstream and downstream). f D DS The downstream data symbol rate:  1   M ds 1   f D DS  f DMT   M SF     M F    where: 1 = overhead due to one RMC symbol per TDD frame 1/MSF = overhead due to one sync symbol per superframe MF = number of symbol periods per TDD frame f US The upstream data symbol rate: D  1   M us 1   f D US  f DMT    M SF    M F    f RMC The RMC symbol rate:  1  f RMC  f DMT       M F  Beoc The maximum number of eoc bytes per direction per logical frame period 6× +125000× = min { − , ( 1− )} (Note 3) DPR DTU payload rate: DPR  DPR  DPR D DR DPRD DTU payload rate part corresponding to data symbols:  K  DPR  8( B ) f   FEC    1 DTUframing OH  (Note 1)   D D D  N FEC  DPReoc The maximum DTU payload rate corresponding to eoc: DPReoc = ( 8 x Beoc ) / (MF / fDMT ) DPRDR DTU payload rate part corresponding to the data portion of the RMC symbol:  K    DPR DR  8( B )  f RMC  FEC    1 DTUframing OH   DR  N FEC  DTUframingOH The relative overhead due to DTU framing: 7 DTUframing OH  Q  K FEC NDR The net data rate (for each direction): NDR  DPR  1000 kbit/s (Note 2) 747     752     753     754     755     756     757     758     759     760     761     762          
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Score: 1117812.6 - https://www.itu.int/en/publica.../files/basic-html/page757.html
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This would increase the link layer overhead and thereby decrease the effective payload rate. (...) It is up to the experimenter to ensure, that the packetized video stream with the added simulator packetization overhead and optional RLC retransmission overhead fits into the available radio bearer. (...) A table including these overhead values will be provided as soon as the simulator software is available. · The compressed header + PDCP/PPP header overhead depends on the video packet sizes used.
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Score: 1116708.3 - https://www.itu.int/wftp3/av-a...deo-site/0109_San/VCEG-N80.doc
Data Source: un
So the question is whether N should be 1 or 2. The total overhead for the byte stream format (including both the overhead of start code prefixes and emulation prevention bytes) is likely to be significantly lower on average for N=1. (...) A Combination Method With Reduced Overhead Interrupting potential start code prefixes earlier in the emulation prevention process can enable byte alignment recovery, but it adds overhead. Lengthening the start codes would cut the emulation prevention overhead, but that adds another kind of overhead in the form of extra start code data.
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Score: 1116708.3 - https://www.itu.int/wftp3/av-a...e/2002_05_Fairfax/JVT-C064.doc
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No Reconfiguration - BE-0.1ρ L No Reconfiguration - BE-1.0ρ L 0.25 No Reconfiguration - BE-2.0ρ L 0.06 Reconfiguration - ST τ = 2 Mean Packet Delay (ms) 0.15 No Reconfiguration - ST-1.0ρ L 0.04 No Reconfiguration - ST τ = 2 Reconfiguration - BE-0.1ρ L Reconfiguration - BE-1.0ρ L Reconfiguration - ST τ = 3 Reconfiguration - BE-2.0ρ L Reconfiguration - ST τ = 4 0.2 0.05 Signaling Overhead (Mbps) No Reconfiguration - ST-0.1ρ L Reconfiguration - ST τ = 5 No Reconfiguration - ST-2.0ρ L No Reconfiguration - ST τ = 3 Reconfiguration - ST-0.1ρ L No Reconfiguration - ST τ = 4 Reconfiguration - ST-1.0ρ L No Reconfiguration - ST τ = 5 Reconfiguration - ST-2.0ρ L 0.1 0.03 0.05 0 0.02 0.01 2 4 6 8 10 12 14 16 18 20 Stream Mean Rate π (Streams/Second) 0 2 4 6 8 10 12 14 16 18 20 (b) = 5 Stream Mean Rate π (Streams/Second) Fig. 12 – Centralized Bidirectional Topology: Mean end‑to‑end delay Fig. 15 – Centralized Bidirectional Topology: Average stream signaling for ST and BE traf ic for varied mean stream lifetime for different BE overhead for TAS with centralized con iguration (CNC) management. loads , and ST stream rates . tional ring compared to the unidirectional ring are more 0.3 modest (roughly 20%). (...) The Stream Mean Rate π (Streams/Second) average signaling delay is slightly lower than in the unidi‑ Fig. 13 – Centralized Bidirectional Topology: Maximum ST packet delay rectional ring (which had a signaling delay around 4 s), for TAS with centralized con iguration (CNC) management. mainly since the signaling hop distances in the bidirec‑ tional ring are shorter than in the unidirectional ring. at the initialized value (20% of CT, i.e., 10 s), resulting in a constant maximum delay of around 50 s, albeit at the Fig. 15 shows the signaling overhead. Since the bidirec‑ expense of rather low admission rates, see Fig 14. tional ring topology is effectively the same as the uni‑ directional ring topology (albeit having another port to Fig. 14 shows the stream admission ratio (percentage). the switch), the signaling overhead in the bidirectional With the high stream generation rate = 20 streams/s ring network is in general very similar to the signaling and long average stream lifetime = 5 s, the admission overhead in the unidirectional topology.
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Score: 1114422.2 - https://www.itu.int/en/publica...1/files/basic-html/page41.html
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No Reconfiguration - BE-0.1ρ L No Reconfiguration - BE-1.0ρ L 0.25 No Reconfiguration - BE-2.0ρ L 0.06 Reconfiguration - ST τ = 2 Mean Packet Delay (ms) 0.15 No Reconfiguration - ST-1.0ρ L 0.04 No Reconfiguration - ST τ = 2 Reconfiguration - BE-0.1ρ L Reconfiguration - BE-1.0ρ L Reconfiguration - ST τ = 3 Reconfiguration - BE-2.0ρ L Reconfiguration - ST τ = 4 0.2 0.05 Signaling Overhead (Mbps) No Reconfiguration - ST-0.1ρ L Reconfiguration - ST τ = 5 No Reconfiguration - ST-2.0ρ L No Reconfiguration - ST τ = 3 Reconfiguration - ST-0.1ρ L No Reconfiguration - ST τ = 4 Reconfiguration - ST-1.0ρ L No Reconfiguration - ST τ = 5 Reconfiguration - ST-2.0ρ L 0.1 0.03 0.05 0 0.02 0.01 2 4 6 8 10 12 14 16 18 20 Stream Mean Rate π (Streams/Second) 0 2 4 6 8 10 12 14 16 18 20 (b) = 5 Stream Mean Rate π (Streams/Second) Fig. 12 – Centralized Bidirectional Topology: Mean end‑to‑end delay Fig. 15 – Centralized Bidirectional Topology: Average stream signaling for ST and BE traf ic for varied mean stream lifetime for different BE overhead for TAS with centralized con iguration (CNC) management. loads , and ST stream rates . tional ring compared to the unidirectional ring are more 0.3 modest (roughly 20%). (...) The Stream Mean Rate π (Streams/Second) average signaling delay is slightly lower than in the unidi‑ Fig. 13 – Centralized Bidirectional Topology: Maximum ST packet delay rectional ring (which had a signaling delay around 4 s), for TAS with centralized con iguration (CNC) management. mainly since the signaling hop distances in the bidirec‑ tional ring are shorter than in the unidirectional ring. at the initialized value (20% of CT, i.e., 10 s), resulting in a constant maximum delay of around 50 s, albeit at the Fig. 15 shows the signaling overhead. Since the bidirec‑ expense of rather low admission rates, see Fig 14. tional ring topology is effectively the same as the uni‑ directional ring topology (albeit having another port to Fig. 14 shows the stream admission ratio (percentage). the switch), the signaling overhead in the bidirectional With the high stream generation rate = 20 streams/s ring network is in general very similar to the signaling and long average stream lifetime = 5 s, the admission overhead in the unidirectional topology.
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Score: 1114422.2 - https://www.itu.int/en/publica...1/files/basic-html/page41.html
Data Source: un
 Page 758 - 5G Basics - Core Network Aspects           Basic HTML Version Table of Contents View Full Version Page 758 - 5G Basics - Core Network Aspects P. 758 2 Transport aspects Table 9-21 – Derived framing parameters Parameter Definition ANDR The aggregate net data rate: ANDR  NDR DS  NDR US RTxOH The retransmission overhead needed to protect against the worst-case impulse noise environment as configured in the DPU-MIB and stationary noise. (...) If INP_min_rein=0 then REIN_OH=0 SHINE_ OH  SHINEratio  4 STAT _OH  10 where STAT_OH is the statistical overhead due to retransmission ETR The expected throughput in kbit/s: ETR = 1( RTxOH ) NDR ETR_min_eoc (Note The minimum expected throughput including the eoc rate: 4) ETR_min_eoc=ETR_min + (1-RTxOH)x(DPReoc – 1000 kbit/s) NOTE 1 – f D is either f US for upstream or f DS for downstream. D D NOTE 2 – This 1000 kbit/s is a reference value for the eoc overhead channel rate for the purpose of this calculation.
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Score: 1109040.1 - https://www.itu.int/en/publica.../files/basic-html/page758.html
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Amendments to Test Conditions · Overhead for CDMA-2000 due to HDLC framing at the PPP layer: The line “Overhead per PPP PDU = PPP packet header (3 bytes) + bit stuffing (~2% of payload)+compressed RTP/UDP/IP header (3 bytes)” shall be changed to “Overhead per PPP PDU = PPP packet header (3 bytes) + octet-synchronous HDLC stuffing (~2% of (payload+compressed RTP/UDP/IP header)) + compressed RTP/UDP/IP header (3 bytes)” · Overhead for UMTS: The line “Overhead per PDCP PDU = PDCP packet header (1 byte) + length info (1 byte) = 2 bytes” shall be changed to “Overhead per PDCP PDU = PDCP packet header (1 byte) + length info (1 byte) + compressed RTP/UDP/IP header (3 bytes) = 5 bytes” · Description of the software simulator as can be found in the next section Software Simulator An implementation of the software simulator as described in document VCEG-M77 can be found in the archive , which is available on the standard ftp-site.
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Score: 1107035.2 - https://www.itu.int/wftp3/av-a...deo-site/0109_San/VCEG-N37.doc
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Tel: Fax: Email: +81-468-40-3517 +81-468-40-3788 shun@mml.yrp.nttdocomo.co.jp Title: Low-overhead INTER Prediction Modes Purpose: Proposal and Discussion _____________________________ 1. (...) On the other hand, four motion vectors have to be transmitted as additional overhead information of an MB. Its overhead, however, can be small by introducing motion vector search strategy which smoothes motion field without significant loss of prediction performance. (...) Conclusion The proposed set of low-overhead INTER prediction modes was evaluated experimentally.
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Score: 1106368.4 - https://www.itu.int/wftp3/av-a...o-site/0109_San/VCEG-N45r1.doc
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