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Dynamic power allocation via wavefront multiplexing through multiple base stations

A novel orthogonal wavefront (WF) multiplexing (Muxing) and de-multiplexing (Demuxing) scheme as the pre- and post-processing method of a new WF transceiver is proposed for down links from multiple base stations (BSs) to multiple mobile units (MUs). By using an adaptive equalizer at the receiver of a MU, the phase deviation due to different distances in down links from multiple BSs to a MU is compensated via the WF Demuxing method. Moreover, this feed-forward scheme allows the dynamic power allocation from BSs to MUs. Simulations verify that the proposed scheme achieves the same bit error rate (BER) performance as the theoretical BER in an additive white Gaussian noise (AWGN) channel. Furthermore, the coherent power combining of the radiation of multiple BSs is accomplished on receivers in the proposed techniques. The radiated signals from the multiple BSs are non-coherent. Thus, due to multipath transmission, the required effective equivalent isotropically radiated power (EIRP) by sending non-coherent signals to the targeted coverage area around MUs is significantly reduced. The associated interfering power levels to other wireless systems in adjacent frequency bands for nearby users will be significantly reduced accordingly.