Title :
DS-CDMA Implementation With Iterative Multiple Access Interference Cancellation
Author :
Dodd, Russell ; Schlegel, Christian ; Gaudet, Vincent
Author_Institution :
Univ. of Alberta, Edmonton, AB, Canada
Abstract :
In this paper an implementation of iterative joint detection for multiple access interference using direct-sequence code-division multiple-access (DS-CDMA) is presented. Results for multiple field programmable gate array (FPGA) platforms and multiple technology nodes for synthesized application specific integrated circuits (ASIC) are presented. The joint detection is performed using a generalized version of interleave-division multiple-access (IDMA) known as partition spreading (PS) CDMA. Decoding is performed using iterative methods from turbo and sum-product decoding. The synthesized ASIC system demonstrates a maximum aggregate throughput of 197 Mb/s for a fully loaded 50-user system, while the implemented FPGA 50-user system has a maximum aggregate throughput of 119 Mb/s.
Keywords :
application specific integrated circuits; code division multiple access; field programmable gate arrays; integrated circuit design; interference suppression; iterative decoding; multi-access systems; radiofrequency integrated circuits; radiofrequency interference; spread spectrum communication; ASIC synthesis; DS-CDMA implementation; IDMA; PS CDMA; application specific integrated circuits synthesis; bit rate 119 Mbit/s; bit rate 197 Mbit/s; direct-sequence code-division multiple-access; interleave-division multiple-access; iterative joint detection; iterative multiple access interference cancellation; multiple FPGA platforms; multiple field programmable gate array platforms; multiple technology nodes; partition spreading CDMA; sum-product decoding; turbo decoding; Bit error rate; Detectors; Field programmable gate arrays; Interference; Iterative decoding; Multiaccess communication; Receivers; Digital circuits; direct-sequence code-division multiple access; field programmable gate arrays; interference cancellation;
Journal_Title :
Circuits and Systems I: Regular Papers, IEEE Transactions on
DOI :
10.1109/TCSI.2012.2215784
