Title :
Sensor-efficient spatial processing of multiple co-channel digital signals
Author :
Schodorf, Jeflrey B. ; Williams, Douglas B. ; Barry, John R.
Author_Institution :
Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
An adaptive space-time processing system for dynamic spatial channels in a CDMA mobile communications network is presented. The proposed system consists of an adaptive sensor array that estimates the desired directions and waveforms, followed by adaptive linear equalizers that refine the waveform estimates by compensating for the mobile radio uplink channel. Capacity gains are achieved through code reuse, which is made possible by performing the spatial processing after the codes have been decorrelated with one another. Simulation results for a two sensor array in a variety of interference scenarios are presented in the form of bit error rate curves
Keywords :
adaptive equalisers; adaptive signal processing; array signal processing; channel capacity; code division multiple access; digital radio; digital signals; land mobile radio; radio networks; radiofrequency interference; CDMA mobile communications network; adaptive linear equalizers; adaptive sensor array; adaptive space-time processing system; bit error rate curves; capacity gains; channel capacity; code reuse; decorrelation; dynamic spatial channels; interference; mobile radio uplink channel; multiple co-channel digital signals; sensor-efficient spatial processing; simulation results; waveform estimates; Adaptive arrays; Adaptive systems; Channel capacity; Equalizers; Land mobile radio; Mobile communication; Multiaccess communication; Performance gain; Sensor arrays; Sensor systems;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1995. ICASSP-95., 1995 International Conference on
Conference_Location :
Detroit, MI
Print_ISBN :
0-7803-2431-5
DOI :
10.1109/ICASSP.1995.480036
