Patent ID: 9634872
Date: 2017-04-25
CPC Classifications: G10L,H04B,H04L,H04W

Claim:
1. A multi-mode receiver, comprising an antenna, an antenna switch, one or more receiving circuit front ends in parallel, a protocol detecting device, an In-phase/Quadrature I/Q demodulator, and a baseband unit, the antenna being connected to one end of the antenna switch, the other end of the antenna switch being connected to an input of the protocol detecting device, a first output of the protocol detecting device being connected to an input of the I/Q demodulator, a second output of the protocol detecting device being connected to an input of the baseband unit, the other end of the antenna switch further being connected to input of the one or more receiving circuit front ends, the input of the I/Q demodulator further being connected to output of the one or more receiving circuit front ends, wherein the antenna is configured for: receiving a signal sent by a base station BS, and transferring the signal sent by the BS to the antenna switch, the signal sent by the BS being in a mode and in a frequency band; the antenna switch is configured for: receiving the signal received by the antenna, forwarding the signal received by the antenna to a receiving circuit front end of the one or more receiving circuit front ends that corresponds to the frequency band of the signal received by the antenna, and sending the signal received by the antenna to the protocol detecting device; each of the one or more receiving circuit front ends is configured for: receiving the signal received by the antenna forwarded by the antenna switch, performing frequency conversion on the signal received by the antenna, and sending the down-converted signal to the I/Q demodulator, the frequency conversion comprising filtering, amplification, down-conversion, Intermediate-Frequency IF filtering, and IF amplification; the protocol detecting device is configured for: receiving and detecting the signal received by the antenna; determining, according to synchronization information of the signal-sending BS side, the mode of the signal received by the antenna; selecting, according to the determined mode of the signal received by the antenna, a transmission mode for transmitting a demodulated signal and a decoding mode for decoding the demodulated signal; informing the I/Q demodulator of the selected transmission mode; informing the baseband unit of the selected decoding mode; the I/Q demodulator is configured for: receiving and demodulating the down-converted signal; sending the demodulated signal to the baseband unit according to the transmission mode selected by the protocol detecting device; and the baseband unit is configured for: decoding the demodulated signal in the decoding mode selected by the protocol detecting device.