Patent ID: 9544123
Date: 2017-01-10
CPC Classifications: H04B,H04L

Claim:
1. An electronic device, comprising: a down converter for decreasing the frequency of a first RF signal to generate the baseband signal; a coupler, coupled to the down converter, wherein the coupler receives the baseband signal; a noise-estimation apparatus, connected to the coupler, wherein the noise-estimation apparatus receives the baseband signal and subtract a predetermined synchronization preamble from the baseband signal to obtain a noise-estimation signal, and the predetermined synchronization preamble conforms to the IEEE 802.11bg standard and/or the IEEE 802.11n standard; an assembly unit, connected to the coupler and the noise-estimation apparatus, wherein the assembly unit receives the baseband signal from the coupler and the noise-estimation signal from noise-estimation apparatus and subtracts the noise-estimation signal from the baseband signal to obtain an output signal; and a demodulator, coupled to the assembly unit, wherein the assembly unit outputs the output signal to the demodulator without passing through the down converter and the coupler.