Patent application number | Description | Published |
20130114453 | Method Applied to Receiver of Wireless Network for Frequency Offset and Associated Apparatus - A method applied to a receiver of a wireless network in response to frequency offset is provided. Upon receiving a preamble, a reference symbol is provided according to a long training symbol in the preamble, and a frequency domain transform is performed on the reference symbol to generate a corresponding reference spectrum. A correlation calculation is performed on the reference spectrum and a predetermined spectrum to provide a first frequency offset. The preamble is carried by a plurality of different sub-carrier frequencies, with a frequency difference between neighboring sub-carrier frequencies being equal to a sub-carrier frequency space. The first frequency offset is an integral multiple of the sub-carrier frequency space. | 05-09-2013 |
20130171943 | Method and Associated Apparatus Applied to Receiver of Wireless Network for Determining Quantity of Antennas of Transmitter - A method applied to a receiver of a wireless network for determining an unknown quantity of antennas of a transmitter according to a received network is provided. The method includes: delaying the network signal according to a sum of a reference period and an estimated shift interval to provide a delayed signal; calculating a correlation between the network signal and the delayed signal to generate a correlation index; comparing the correlation index and a threshold to provide a comparison result; and determining the unknown quantity of transmitting antennas according to the comparison result. | 07-04-2013 |
20130216008 | Method and Associated Apparatus for Determining Signal Timing of Wireless Network Signal - A method for determining signal timing of a wireless network signal is provided. The method includes: performing match-filtering on the wireless network signal transmitted by one or multiple antennas to provide a match value distribution, performing moving averaging on the match value distribution to provide an accumulation distribution, searching a peak of the accumulation distribution to provide a central timing according to a timing at which the peak occurs, and determining the signal timing (e.g., a symbol boundary) of the wireless network signal according to the central timing. | 08-22-2013 |
20130253867 | Signal Processing Method and Associated Apparatus - A signal processing apparatus for receiving a spectral line of an original signal includes a starting point determining module, a searching module and a symbol rate determining module. The starting point determining module finds a maximum energy in the spectral line and determines at least one search starting point according to the maximum energy. From the at least one search starting point, the searching module searches along the spectral line towards a region with a lower energy for at least one minimum energy satisfying a predetermined condition. The symbol rate determining module determines a symbol rate of the original signal according to the at least one minimum energy. | 09-26-2013 |
20130258201 | SIGNAL PROCESSING APPARATUS AND ASSOCIATED METHOD - A signal processing apparatus includes an initial detecting module, a mixer, a symbol rate detecting module, a judging module and a correcting module. The initial detecting module determines an initial carrier frequency offset of an input signal according to a spectrum of the input signal. The mixer adjusts the input signal according to the initial carrier frequency offset to generate a frequency-compensated signal. The symbol rate detecting module determines a symbol rate of the input signal. The judging module judges whether the initial carrier frequency offset is correct according to the frequency-compensated signal. When a judgment result of the judging module is negative, the correcting module determines a corrected carrier frequency offset according to the symbol rate and the spectrum. | 10-03-2013 |
20130279554 | Apparatus and Method for Correcting Phase Error - An apparatus for correcting a phase error is provided. The apparatus includes an error estimating module and a correcting module. The error estimating module receives a phase-shift keying signal, and calculates a phase error according to the phase-shift keying signal, a plurality of known candidate signals and Bayesian estimation. The correcting module corrects the phase-shift keying signal according to the phase error. | 10-24-2013 |
20130318557 | APPARATUS AND METHOD FOR DETECTING SPECTRUM INVERSION - An apparatus for detecting spectrum inversion includes a different correlator and a determining module. The differential correlator performs an odd-order differential correlation on an input signal and a known signal to generate a differential correlation result. When the input signal is determined as corresponding to a target signal of the known signal, the determining module detects spectrum inversion in the input signal according to the phase of the differential correlation result. | 11-28-2013 |
20140293808 | WIRELESS RECEIVING SYSTEM AND ASSOCIATED SIGNAL PROCESSING METHOD - A wireless receiving system includes a packet searching module and a memory module. The packet searching module performs packet searching that includes adopting at least one parameter. The memory module stores the at least one parameter corresponding to a packet as a set of reference parameters. At a predetermined time point, the packet searching module again performs packet searching according to the set of reference parameters stored in the memory module. | 10-02-2014 |
20140293892 | WIRELESS SIGNAL RECEIVER AND ASSOCIATED SIGNAL PROCESSING METHOD - A wireless signal receiver includes a receiving module, an automatic gain control (AGC) module, a measuring module, a decoding module, and a control module. The receiving module receives a wireless signal. The AGC module adjusts an amplitude of the wireless signal according to a gain to generate an adjusted signal. The measuring module measures a signal strength of the adjusted signal. The decoding module decodes the adjusted signal. When the decoding module determines that the adjusted signal corresponds to a beacon packet transmitted from a transmitting end, the control module adjusts the gain according to the signal strength. | 10-02-2014 |