Maximum spectral utilization efficiency multi-code fixed spreading length (MFSL) multi-rate transmission scheme for MC-CDMA
Document Type
Conference Proceeding
Publication Date
12-1-2002
Abstract
In this paper, a new multi-rate transmission scheme for MC-CDMA system is proposed to achieve the maximum spectral utilization efficiency. In this scheme, all different rate users are designed to have the same processing gain and share the same set of sub-carriers, whose frequency spacing equals the lowest rate users bandwidth. With such sub-carrier assignment, due to the narrow bandwidth of each sub-carrier, flat fading on each sub-carrier can easily be obtained, which is essential for multi-carrier (MC) transmission [1]. Multi-code scheme [2,3] is used to convert the multi-rate system to an equivalent single lowest rate system by splitting a higher rate stream into a plurality of lowest rate streams and assigning each of them a different spreading code. Due to the improved spectral utilization efficiency, all lower rate users possess stronger interference suppression capability than in the uncoded fixed spreading length (UFSL)[4] and coded FSL (CFSL) scheme [5], particularly in the high interference region. The bit error rate (BER) performance versus signal-to-noise ratio (SNR) per bit and interference-to-signal ratio (ISR) are compared with the UFSL and block coded FSL (BCFSL) scheme by simulation in a correlated Rayleigh fading channel.
Identifier
6344231721 (Scopus)
Publication Title
Proceedings 2002 International Conference on Third Generation Wireless and Beyond Key Function of World Wireless Congress
First Page
587
Last Page
591
Recommended Citation
Tan, Mizhou and Bar-Ness, Yeheskel, "Maximum spectral utilization efficiency multi-code fixed spreading length (MFSL) multi-rate transmission scheme for MC-CDMA" (2002). Faculty Publications. 14500.
https://digitalcommons.njit.edu/fac_pubs/14500