Patent ID: 8750426
Filing Date: 2014-06-10
Classification: H04B,H04L

Abstract:
1. A receiver for FSK modulation signals, said receiver including: an antenna for receiving modulated data or control signals, at least one low noise amplifier for amplifying and filtering the signals picked up by the antenna, a local oscillator with a quartz resonator, including, in a phase and frequency lock loop, a voltage controlled oscillator for supplying high frequency signals, at least one mixer unit for mixing the incoming, filtered and amplified signals with the high frequency signals supplied by the voltage controlled oscillator to generate intermediate signals, whose frequency is equal to the difference between the high frequency signal frequency and a carrier frequency of the incoming signals, and a filtering unit for filtering the intermediate signals for at least one data or control demodulation stage, wherein the receiver can be configured for receiving modulated data or control signals at medium or high rate or for receiving modulated data or control signals at low rate, and wherein the filtering unit supplies intermediate signals filtered in a polyphase filter to a first demodulation stage in medium or high rate mode, or intermediate, baseband signals filtered in the polyphase filter, which is converted into at least one low-pass filter, to a second demodulation stage in low rate mode.