Paper Info
Title
Bit-interleaved low density spread (BI-LDS) transmission
Abstract
Achieving higher aggregate data rates for many simultaneous users is considered as a fundamental challenge for the next generation of wireless systems. With low-density spreading (LDS), one could transmit information by overloading, i.e., using more spreading sequences than chips with reasonable implementation complexity. In this paper, we propose an improvement to the conventional LDS technique that consists in introducing a bit interleaver in the transmission scheme. Its role is to render the error bursts that appear at the output of the LDS detector into correctable patterns for the channel decoder. Numerical evaluations of the spectral efficiency show SNR improvements of more than 2dB when using convolutional codes in BI-LDS schemes. Slight improvements are also observed when turbo codes are employed.
Year
DOI
Venue
2014
10.1109/WCNC.2014.6952129
Wireless Communications and Networking Conference
Keywords
Field
DocType
channel coding,decoding,error correction codes,interleaved codes,radio transmitters,turbo codes,BI-LDS schemes,LDS detector,SNR improvements,aggregate data rates,bit interleaver,bit-interleaved low-density spread transmission,channel decoder,convolutional codes,correctable patterns,error bursts,simultaneous users,spectral efficiency,spreading sequences,turbo codes,wireless systems
Forward error correction,Concatenated error correction code,Convolutional code,Low-density parity-check code,Computer science,Serial concatenated convolutional codes,Turbo code,Theoretical computer science,Eb/N0,Electronic engineering,Real-time computing,Turbo equalizer
Conference
ISSN
Citations 
PageRank 
1525-3511
4
0.51
References 
Authors
2
3
Name
Order
Citations
PageRank
Branislav M. Popovic19617.13
Anahid Robert Safavi260.91
Alberto Perotti3446.80