Title :
Throughput efficient block-spreading CDMA: sequence design and performance comparison
Author :
Tomasin, Stefano ; Tosato, Filippo
Author_Institution :
Dept. of Inf. Eng., Padova Univ.
Abstract :
In this paper we propose a new multiple user architecture for broadband wireless communications based on code division multiple access, denoted block CDMA (B-CDMA). The B-CDMA transmitter spreads the data on a block basis and a single cyclic prefix is used at the end of each spread block. We investigate the orthogonality of spreading sequences for B-CDMA, for an uplink broadband transmission and we design sequences that minimize the power of multiuser access interference. Equalization of the received signal is performed through an iterative block decision feedback equalizer (IBDFE). The B-CDMA system is compared to existing block spreading schemes in terms of achievable throughput for a wireless broadband uplink transmission
Keywords :
broadband networks; code division multiple access; decision feedback equalisers; radio networks; sequences; transmitters; block-spreading CDMA; broadband wireless communications; code division multiple access; cyclic prefix; iterative block decision feedback equalizer; multiuser access interference; spreading sequences; uplink broadband transmission; Broadband communication; Decision feedback equalizers; Dispersion; Frequency domain analysis; Multiaccess communication; Multiple access interference; Radio transmitters; Throughput; Wideband; Wireless communication;
Conference_Titel :
Global Telecommunications Conference, 2005. GLOBECOM '05. IEEE
Conference_Location :
St. Louis, MO
Print_ISBN :
0-7803-9414-3
DOI :
10.1109/GLOCOM.2005.1578069
