Wireless Fading Paradigm for Antenna Array Receiver for a Disk-Type Cluster of Scatterers
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This correspondence presents a signal processing based alternate approach for simulating the flat fading narrowband wireless channels for the antenna array receivers under the time-varying environment, in which the discrete disk of scatterers is incorporated around the mobile wireless transmitter to model the spreading of azimuth. The disk-type cluster of scatterers continuously changes due to the movement of the mobile wireless transmitter. Under this time-varying environment, each scatterer, at the successive stages of the disk, is correlated with the scatterers at the preceding stages of the disk using the second-order autoregressive process AR(2). At the receiver, one signal waveform is associated with each element of the antenna array taking into account the spread in azimuth of the received signal. The correlation of the fading waveforms generated by using the presented paradigm is compared with the expected analytical correlation results, which clearly manifests that the simulation results are consistent with the findings based on Jakes’ model. Moreover, the presented discrete disk-type cluster of scatterers fading model may be used to generate/simulate the variable diameter ring-type cluster of scatterers fading paradigm. The proposed channel model may play a significant role in the emerging field of wireless signal processing for the latest mobile communication systems.
KeywordsRayleigh fading Autoregressive processes Jakes’ model Doppler spectrum Multipath fading
Mr. Surjeet Singh is thankful to Mr. Divneet Singh Kapoor, Assistant Professor, Electronics and Communication Engineering Department, Chandigarh Group of Colleges, Gharuan, Mohali, India for his fruitful suggestions and motivational technical discussions regarding the time-varying wireless fading channel modeling.
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