Transcription of Time--Domain Compression of ComplexDomain Compression …
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Time--Domain Compression of ComplexDomain Compression …
TimeTimeTimeTime----Domain Compression of ComplexDomain Compression of ComplexDomain Compression of ComplexDomain Compression of Complex----BBBB aaaasssseeeebbbbaaaannnndddd LLLLTTTTEEEE SSSS iiiiggggnnnnaaaallllssss ffffoooorrrr CCCC lllloooouuuudddd RRRR aaaaddddiiiioooo AAAA cccccccceeeessssssss NNNN eeeettttwwwwoooorrrrkkkkssssMr. Karl F. Nieman and Prof. Brian L. Evans, Wireless Networking and Communications Group, The University of Texas at AustinOur ApproachLTE-A Signal StructureObjective: Achieve 5xcompression of complex-baseband wireless signals to reduce cost of deployments for LTE-Advanced and Link-Level Simulator w/ CompressionCloud Radio Access Networks (C-RANs)Project supported by HuaweiC-RAN with CPRI Link CompressionProject website: ~bevans/papers/2013/LTEcompression/Virtu al PartitionBS1BS2UE2UE4UE3UE1 CPRI Radio Head (RRH)AFEADCBase Station (BS) ProcessingCPRI link(s).
Figure taken from TSI, LTE in a Nutshell • Reduce in-band quantization noise by 9 dB due to noise shaping • Achieve 3x compression from noise shaping and Gaussian quantization (see plots on far right) • Resample and strip CP in downlink • Achieve 5x overall compression for downlink and uplink
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