Title :
On the spectral efficiency of CDMA with space-time spreading
Author :
Sudarshan, Pallav ; Hughes, Brian L.
Author_Institution :
Dept. of Electr. & Comput. Eng., North Carolina State Univ., Raleigh, NC, USA
Abstract :
We consider a general, synchronous, randomly-spread code-division multiple-access transmission scheme in which the transmitted data is any linear combination of the data and the spreading sequences are not tied to any specific transmit antenna. For large user populations, we characterize the spectral efficiency (capacity per chip) as a function of the array size, signal-to-noise ratio and the number of users per chip in the presence of frequency flat fading.
Keywords :
antenna arrays; code division multiple access; data communication; fading channels; multipath channels; multiuser channels; spectral analysis; spread spectrum communication; transmitting antennas; SNR; array size; code-division multiple-access; data transmission; frequency flat fading; multipath channels; randomly-spread CDMA; signal-to-noise ratio; space-time spreading; spectral efficiency; spreading sequences; transmit antenna; Multiaccess communication;
Conference_Titel :
Wireless Communications and Networking Conference, 2002. WCNC2002. 2002 IEEE
Print_ISBN :
0-7803-7376-6
DOI :
10.1109/WCNC.2002.993360
