Non Data Aided SNR Estimation for OFDM Signals in Frequency Selective Fading Channels

SNR estimation for OFDM signals in frequency selective fading channels

“…The frequency offset decreases the desired signal power and leads to the SNR reduced. While the estimation method in [8] is also blind SNR estimation where there has the frequency offset, but the method of Gaussian noise power estimation is not accurate and cause that the final estimate SNR is not accurate. From Fig.1 know that the method in this paper is superior to the method in [8].…”

“…This is due to the Gaussian noise is not sensitive to frequency offset. But the method in [8] has great errors because of the method itself, so the method is vulnerable to the influence of the deviation. represents the actual SNR.…”

“…the frequency offset and time delay is zero). Although it is in [8] frequency offset estimation using the cyclic prefix Gauss noise power, but in fact, this method is not accurate. Now, there are lots of articles abort the SNR estimation, but most of them have the frequency offset.…”

A novel octagon pilot pattern design method

“…Only the master user's pilot rational design can avoid mutual interference between transmitter and receiver. In system bandwidth range, receiver can receive information by their non-active subcarriers [16].…”

“…Reference [1][2][3] Wireless OFDM communication system was influenced serious by shadow fading radio channel and frequency selective fading, so the impact of wireless channel must be strived to reduce, wireless OFDM system channel estimation techniques put forward a very high demand, channel estimation good or bad will directly affect the overall system performance advantages [1][2].…”