Method and apparatus for performing analog-to-digital...

Details Method and apparatus for performing analog-to-digital... Method and apparatus for performing analog-to-digital...

2006-11-03

2010-11-16

Tran, Khanh C (Department: 2611)

Pulse or digital communications

Receivers

Interference or noise reduction

C341S155000

Reexamination Certificate

active

07835478

ABSTRACT:
Disclosed are an analog-to-digital conversion method and apparatus capable of reducing quantization distortion in a receiver supporting multi-standard radios for which digital signal processing must be differently performed. The analog-to-digital conversion apparatus includes a first filter for filtering an input analog signal into a plurality of sub-band signals, a down-sampler for down-sampling the sub-band signals, a sub-band processor for allocating quantization bits for the sub-band signals, respectively, and digitizing the sub-band signals by using the allocated quantization bits, an up-sampler for up-sampling the digitized sub-band signals, and a second filter for reconstructing the sub-band signals into one digital signal. Multi-standard radio signals can be processed into digital signals in a receiver to which SDR is applied, and quantization distortion can be reduced during a procedure of converting the radio signal into the digital signal.

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