| Presentation | 2004/7/9 Comparison of QRM-MLD Employing Multipath Interference Canceller on Throughput and Computational Complexity in Broadband DS-CDMA Junichiro Kawamoto, Noriyuki Maeda, Kenichi Higuchi, Mamoru Sawahashi, |
|---|---|
| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper compared throughput performance and computational complexity of MLD with QR decomposition and M-algorithm (QRM-MLD hereafter) combined with multipath interference canceller (MPIC) with those of two-dimensional Minimum Mean Squared Error (MMSE), original QRM-MLD, and serial interference canceller using decision-feedback data symbols after Turbo decoding (SIC hereafter) for MIMO multiplexing in broadband DS-CDMA wireless access. Computer simulation results elucidated that the required average received signal energy per bit-to-noise power spectrum density ratio (E_b/N_O) at the average block error rate of 10^<-1> using the QRM-MLD coupled with MPIC was decreased by approximately 7.0 and 3.0 dB compared to that of two-dimensional MMSE and SIC, respectively, for 8PSK modulation and channel coding rate of R=3/4 assuming 40-MHz channel bandwidth in DS-CDMA with 15-code multiplexing for spreading factor of 16 (six-path Rayleigh fading with r. m. s. delay spread of 0.35 jisec and f_D=20Hz). Further, the throughput of 300 Mbps was achieved at the average received E_b/N_O of approximately 12 dB for 8PSK and R=8/9 and the increase in computational complexity of the QRM-MLD in the case was suppressed to approximately 10 and 2.8 times that of two-dimensional MMSE and SIC, respectively. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | broadband DS-CDMA / MIMO / maximum likelihood detection / two-dimensional minimum mean squared error / multipath interference canceller |
| Paper # | NS2004-74,RCS2004-110 |
| Date of Issue |
| Conference Information | |
| Committee | NS |
|---|---|
| Conference Date | 2004/7/9(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
| Secretary | |
| Assistant | |
| Paper Information | |
| Registration To | Network Systems(NS) |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Comparison of QRM-MLD Employing Multipath Interference Canceller on Throughput and Computational Complexity in Broadband DS-CDMA |
| Sub Title (in English) | |
| Keyword(1) | broadband DS-CDMA |
| Keyword(2) | MIMO |
| Keyword(3) | maximum likelihood detection |
| Keyword(4) | two-dimensional minimum mean squared error |
| Keyword(5) | multipath interference canceller |
| 1st Author's Name | Junichiro Kawamoto |
| 1st Author's Affiliation | IP Radio Network Development Department, NTT DoCoMo, Inc.() |
| 2nd Author's Name | Noriyuki Maeda |
| 2nd Author's Affiliation | IP Radio Network Development Department, NTT DoCoMo, Inc. |
| 3rd Author's Name | Kenichi Higuchi |
| 3rd Author's Affiliation | IP Radio Network Development Department, NTT DoCoMo, Inc. |
| 4th Author's Name | Mamoru Sawahashi |
| 4th Author's Affiliation | IP Radio Network Development Department, NTT DoCoMo, Inc. |
| Date | 2004/7/9 |
| Paper # | NS2004-74,RCS2004-110 |
| Volume (vol) | vol.104 |
| Number (no) | 184 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |