Title :
SINR for DS-CDMA with random spreading
Author :
Chiang, Ping-Hung ; Lin, Ding-Bing ; Li, Hsueh-Jyh
Author_Institution :
Graduate Inst. of Commun. Eng., Nat. Taiwan Univ., Taiwan
fDate :
30 May-1 June 2005
Abstract :
For wireless multipath fading channels, the performance of a direct-sequence code-division multiple-access (DS-CDMA) system is degraded by interference, including multipath interference (MPI) and multiuser interference (MUI). For the downlink DS-CDMA with random spreading, we derive the variances of MPI and MUI and obtain the signal-to-interference-plus-noise ratio (SINR). The simple and elegant expressions for the variances of the interference provide useful insights, while the corresponding SINR representation is helpful in evaluating the bit-error-rate (BER) performance that takes the impact of the interference into consideration. In order to demonstrate our approach, an example regarding the performance analysis of the two-input-single-output (2ISO) space-time block coded DS-CDMA with RAKE reception is also provided.
Keywords :
block codes; code division multiple access; error statistics; fading channels; multipath channels; radio receivers; radiofrequency interference; signal processing; space-time codes; spread spectrum communication; statistical analysis; BER; DS-CDMA; RAKE reception; SINR; bit-error-rate; direct-sequence code-division multiple-access; multipath channels; multipath interference; multiuser interference; random spreading; signal-to-interference-plus-noise ratio; space-time block code; space-time code; variance; wireless multipath fading channels; Baseband; Bit error rate; Degradation; Downlink; Fading; Intersymbol interference; Multiaccess communication; Multiple access interference; Performance analysis; Signal to noise ratio; Antenna diversity; DS-CDMA; MPI; MUI; RAKE reception; SINR; random spreading;
Conference_Titel :
Vehicular Technology Conference, 2005. VTC 2005-Spring. 2005 IEEE 61st
Print_ISBN :
0-7803-8887-9
DOI :
10.1109/VETECS.2005.1543316
