Low-complexity diversity using coarse fft and subband-wise combining

Abstract

A wireless diversity receiver includes, in part, N signal processing paths, a bin-wise combiner, and an inverse transformation module. Each signal processing path includes, in part, a mixer adapted to downconvert a frequency of an RF signal received by that path, an analog-to-digital converter adapted to convert the downconverted signal from an analog signal to a digital signal, and a transformation block adapted to transform the digital signal represented in time domain to an associated frequency domain signal having M subband signals. The bin-wise combiner is configured to combine the corresponding subband signals of the N paths. The inverse transformation block is configured to transform the output of the bin-wise combiner to an associated time-domain signal.

Description

[0001] Cross References to Related Applications [0002] This application claims priority under 35 USC 119(e) to US Provisional Application No. 60 / 978,645, filed October 9, 2007, the entire contents of which are incorporated herein by reference. This application is related to US Patent Application No. 11 / 874,854, entitled "Low Complexity Diversity Receiver," filed October 18, 2007, the entire contents of which are incorporated herein by reference. Background technique [0003] Conventional antenna diversity systems typically use one receiver path for each antenna present in the system. figure 1 A receiver 100 with three antenna diversity receiver paths is shown in . Receiver 100 is shown including receiver paths 120 , 140 and 160 . Each receiver path is shown to include: a low noise amplifier, a frequency conversion module, one or more filters, a variable gain amplifier, which collectively form an analog front end; and a baseband processor. For example, if figure 1 As show...

AI Technical Summary

Problems solved by technology

Traditional diversity receivers use two complete receivers, doubling the cost, power and size of single-band MRC

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