Diversity-coding-orthogonality tradeoff for coded MC-CDMA with high level modulation

Deepshikha Garg; Fumiyuki Adachi

doi:10.1109/ICCS.2004.1359458

Diversity-coding-orthogonality tradeoff for coded MC-CDMA with high level modulation

Deepshikha Garg, Fumiyuki Adachi

Research Organization of Electrical Communication (ROEC)

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

2 Citations (Scopus)

Abstract

In MC-CDMA, the data rate can be increased by reducing the spreading factor SF or by allowing multicode transmission. In this paper, we evaluate by computer simulations which gives a better bit error rate (BER) performance - lower SF or multi code operation - when high level modulation is used in addition to error control coding. For a coded system in a frequency selective channel, there is a tradeoff between frequency diversity gain due to the spreading of symbols, coding gain due to better frequency interleaving effect and orthogonality destruction. It is shown that for QPSK, the performance of OFDM (MCCDMA with SF=I) is almost the same as that of a fully spread MC-CDMA system. However, for 16QAM and 64QAM, the BER performance is better for lower SF unlike the uncoded system, wherein higher SF gives a better BER.

Original language	English
Title of host publication	9th International Conference on Communications Systems 2004, ICCS 2004
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	650-654
Number of pages	5
ISBN (Electronic)	0780385497, 9780780385498
DOIs	https://doi.org/10.1109/ICCS.2004.1359458
Publication status	Published - 2004 Jan 1
Event	9th International Conference on Communications Systems, ICCS 2004 - Singapore, Singapore Duration: 2004 Sep 7 → …

Publication series

Name	9th International Conference on Communications Systems 2004, ICCS 2004

Other

Other	9th International Conference on Communications Systems, ICCS 2004
Country	Singapore
City	Singapore
Period	04/9/7 → …

ASJC Scopus subject areas

Computer Networks and Communications

Access to Document

10.1109/ICCS.2004.1359458

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Garg, D., & Adachi, F. (2004). Diversity-coding-orthogonality tradeoff for coded MC-CDMA with high level modulation. In 9th International Conference on Communications Systems 2004, ICCS 2004 (pp. 650-654). [1359458] (9th International Conference on Communications Systems 2004, ICCS 2004). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ICCS.2004.1359458

Diversity-coding-orthogonality tradeoff for coded MC-CDMA with high level modulation. / Garg, Deepshikha; Adachi, Fumiyuki.

9th International Conference on Communications Systems 2004, ICCS 2004. Institute of Electrical and Electronics Engineers Inc., 2004. p. 650-654 1359458 (9th International Conference on Communications Systems 2004, ICCS 2004).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Garg, D & Adachi, F 2004, Diversity-coding-orthogonality tradeoff for coded MC-CDMA with high level modulation. in 9th International Conference on Communications Systems 2004, ICCS 2004., 1359458, 9th International Conference on Communications Systems 2004, ICCS 2004, Institute of Electrical and Electronics Engineers Inc., pp. 650-654, 9th International Conference on Communications Systems, ICCS 2004, Singapore, Singapore, 04/9/7. https://doi.org/10.1109/ICCS.2004.1359458

Garg D, Adachi F. Diversity-coding-orthogonality tradeoff for coded MC-CDMA with high level modulation. In 9th International Conference on Communications Systems 2004, ICCS 2004. Institute of Electrical and Electronics Engineers Inc. 2004. p. 650-654. 1359458. (9th International Conference on Communications Systems 2004, ICCS 2004). https://doi.org/10.1109/ICCS.2004.1359458

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