Title :
Influence of nonorthogonality on the signal to interference ratio of a decorrelation receiver
Author_Institution :
Siemens AG Osterreich, Austria
Abstract :
Direct sequence spread spectrum is one candidate to be used as a radio access technique for a global personal telecommunication system. For such an application a high spectral efficiency is required. The decorrelation receiver has been proposed to increase the capacity of spread spectrum systems and to overcome the near-far problem. The improvement of the signal to interference ratio is achieved at the expense of some noise enhancement. This paper investigates the degree of the noise enhancement and concludes that for reasonable values of the crosscorrelation values the loss is well below 3 dB
Keywords :
channel capacity; code division multiple access; correlation methods; land mobile radio; noise; personal communication networks; pseudonoise codes; radio receivers; radiofrequency interference; spread spectrum communication; CDMA; crosscorrelation; decorrelation receiver; direct sequence spread spectrum; global personal telecommunication system; high spectral efficiency; near-far problem; noise enhancement; nonorthogonality; radio access technique; signal to interference ratio; system capacity; Decorrelation; Degradation; Delay estimation; Detectors; Frequency; Interference; Multiaccess communication; Receivers; Signal to noise ratio; Spread spectrum communication;
Conference_Titel :
Spread Spectrum Techniques and Applications Proceedings, 1996., IEEE 4th International Symposium on
Conference_Location :
Mainz
Print_ISBN :
0-7803-3567-8
DOI :
10.1109/ISSSTA.1996.563244
