Hypergeometric functions and their applications
Hypergeometric functions and their applications
Adaptive filter theory (3rd ed.)
Adaptive filter theory (3rd ed.)
Space-Time Optimum Combining for CDMA Overlay for Personal Communications Systems
Wireless Personal Communications: An International Journal
Performance of CDMA Cellular Networks with Base-Station Antenna Arrays
Proceedings of the 1994 International Zurich Seminar on Digital Communications: Mobile Communications: Advanced Systems and Components
Handbook of Mathematical Functions, With Formulas, Graphs, and Mathematical Tables,
Handbook of Mathematical Functions, With Formulas, Graphs, and Mathematical Tables,
Wireless Personal Communications: An International Journal
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The requirement to suppress narrowband interferences in CDMA communicationsstems from the overlay concept, i.e., coexistence of different types ofsignals in the same frequency band. The conventional approach to rejectingthe narrowband interferences has been to whiten the received signalcontaining the interference, prior to spread spectrum demodulation. In thispaper, it is proposed to achieve the interference rejection through spatialprocessing. The main benefit of this approach is its robustness with respectto the interference bandwidth. Stepping up from single domain spatialprocessing to space-time processing provides degrees of freedom for bothoverlay interference cancellation and diversity combining. Two space-timearchitectures, cascade and joint-domain, are studied and compared to aRake receiver preceded by a whitening filter. Main contributions of thepaper are the development of analytical expressions of (1) the efficiency ofeach method, (2) the p.d.f.‘s of the output SNR in a Rayleigh fadingenvironment, and (3) the error probability associated with each method. Theanalysis therein demonstrates that the joint-domain architecture outperformsthe cascade configuration, which in turn is superior to the whiteningfilter-Rake combination.