| Patent Number |
Title Of Patent |
Date Issued |
| 7596182 |
Optimum symbol timing estimation with various performance measures for OFDM systems |
September 29, 2009 |
| A receiver in an OFDM system may include a multi-mode estimator to estimate symbol timing offset for different performance measures. In addition to a maximum likelihood estimation mode, the estimator may have a minimum failure probability estimation mode, a minimum mean square error |
| 7593426 |
Bit rate and power allocation for multi-carrier communication systems |
September 22, 2009 |
| Approaches to operating a multi-user, multi-carrier communication system involve allocating a target bit rate across user channels and subchannels to adjust the power. The target bit rate is allocated among subchannels of the user channels as a function of system power associated with th |
| 7570722 |
Carrier frequency offset estimation for OFDM systems |
August 4, 2009 |
| A system comprises a receiver module that receives a signal that is modulated using coherent orthogonal frequency division multiplexing (OFDM) modulation. A signal to noise ratio (SNR) module communicates with the receiver module and generates a SNR estimate based on the OFDM signal. |
| 7555065 |
Adaptive signal tuning for digital radio receivers operating in FM bands |
June 30, 2009 |
| A radio receiver for receiving analog signals in a Frequency Modulation (FM) band includes a hybrid/all digital decoder that decodes a digital audio signal. An analog FM demodulator generates a demodulated analog audio signal. The analog FM demodulator demodulates the analog audio si |
| 7515657 |
Frequency tracking for OFDM transmission over frequency selective channels |
April 7, 2009 |
| A system comprises a receiver module that generates a receiver carrier frequency and that demodulates an orthogonal frequency division multiplexing (OFDM) signal using the receiver carrier frequency. A CFO estimator module communicates with the receiver module and generates a carrier |
| 7505523 |
Integer frequency offset estimation based on the maximum likelihood principal in OFDM systems |
March 17, 2009 |
| A receiver in an OFDM system may include a maximum likelihood (ML) estimator that estimates the integer part of the carrier frequency offset. The estimator may operate with or without pilot subcarriers. The estimator may calculate the integer frequency offset estimate based on the cy |
| 7433425 |
Adaptive signal tuning for digital radio receivers operating, in FM bands |
October 7, 2008 |
| A radio receiver for receiving analog signals in a Frequency Modulation (FM) band includes a hybrid/all digital decoder that decodes a digital audio signal. An analog FM demodulator generates a demodulated analog audio signal. The analog FM demodulator demodulates the analog audio si |
| 7421013 |
Maximum likelihood estimation of time and frequency offset for OFDM systems |
September 2, 2008 |
| A receiver in an OFDM system may include a joint maximum likelihood (ML) estimator that estimates both time offset and frequency offset. The estimator may use samples in an observation window to estimate the time offset and frequency offset. |
