An integrating low cost and low power all-digital signal receiver for narrow-band radio frequency architectures in interfered channel

In radio frequency technologies, the increase of transmission speed rate is one of the first aims for designers. However, analog components actually used in the receiver for normalized signals as the WIFI or the BLUETOOTH, can contribute to hide some errors. Thereby, there is generally some large correction procedure. The paper presents the theory and simulation results of an all digital receiver, a receiver with an end BER low regarding to the signal to noise ratio in reception. Its method consists in using under-sampling at low frequency regarding to the carrier frequency, digital demodulation and an original filter with an aim of upgrading the Signal to Noise Ratio (SNR). In fact, under-sampling can only be achieved when the signal is narrow-band, which is generally not the case for noise so that it induces the decrease of the SNR. So, one the main originality of this work is the use of a Stochastic Matched Filter (SMF) which increases the SNR after the under-sampling step. This step is succeeded by a matched filter on deterministic signal. This SMF involves a complexity of integration and a large time processing. In this way, the second originality of this work is to bring out this SMF to only one FIR filter.