Abstract: A module and method for a joint detection interference cancellation receiver with the multiple signal timing control and interference cancellation timing control. The invention provides a means of performing interference cancellation for signals that are asynchronous with respect to each other while enabling signal synchronous processing of the individual signals. The present invention can be utilized with wireless signals that posses a signal format defining a fixed timing interval and a frame structure.

Abstract: A module and method for a joint detection interference cancellation receiver with the multiple signal timing control and interference cancellation timing control. The invention provides a means of performing interference cancellation for signals that are asynchronous with respect to each other while enabling signal synchronous processing of the individual signals. The present invention can be utilized with wireless signals that posses a signal format defining a fixed timing interval and a frame structure.

Abstract: A receiver implementing a single carrier single burst equalization (SC-SBE) method is capable of achieving near optimal reception of individual single carrier RF bursts by making an accurate estimate of the burst's propagation channel impulse response (CIR). The SC-SBE method uses a CIR based coefficient computation process to obtain filter coefficients for a minimum mean square error decision feedback equalizer (MMSE-DFE). The MMSE-DFE filter computation process computes a sufficiently large number of coefficients for the DFE filters, i.e., the feed forward filter (FFF) and feedback filter (FBF), so that each filter spans the maximum anticipated length of the CIR. In order to implement the filters efficiently, a coefficient selection process eliminates less significant computed FFF and FBF coefficients. The resulting FFF and FBF are sparse filters in that most of the taps in the filter delay lines do not have a filter coefficient.

Abstract: A module and method for channel estimate based timing recovery comprises a timing estimation module, a channel estimation module communicably coupled to the timing estimation module, a conversion module communicably coupled to the timing estimation module and to the channel estimation module, and an analog pulse shaping filter communicably coupled to the conversion module, wherein: the analog pulse shaping filter receives an analog signal and outputs a filtered analog signal, the conversion module receives the filtered analog signal and outputs a 1/T rate signal to the channel estimation module, the channel estimation module outputs a 1/T Channel Impulse Response (CIR) estimate to the timing estimation module, and the timing estimation module outputs a timing estimate to the conversion module, wherein the timing estimate is used in conjunction with an output of the conversion module to provide the 1/T rate signal.

Abstract: A System, method and computer readable medium for determining an active code set comprises determining code detection statistics for corresponding spread code indices, sorting the determined code detection statistics and the corresponding spread code indices according to amplitudes of the code detection statistics, and determining an active code set based on the sorted code detection statistics and the corresponding sorted spread code indices.

Abstract: A system and method, comprising a despread module that receives a descrambled signal and an identification of active codes, a soft-symbols memory communicably coupled to the despread module, and a respread module that receives the identification of active codes, a modulation type and gain estimate for the active codes, and soft symbol estimates for the active codes from the soft-symbols memory which is communicably coupled to the respread module, the despread module, comprising: a despread signal memory that receives the descrambled signal, a vector code despread module communicably coupled to the despread signal memory, an active code soft symbol grabber that receives the identification of active codes and is communicably coupled to the despread signal memory, wherein the despread signal memory receives properly arranged despread data from the vector code despread module.

Abstract: A System, method and computer readable medium for determining an active code set comprises determining code detection statistics for corresponding spread code indices, sorting the determined code detection statistics and the corresponding spread code indices according to amplitudes of the code detection statistics, and determining an active code set based on the sorted code detection statistics and the corresponding sorted spread code indices.

Abstract: A system and method, comprising a despread module that receives a descrambled signal and an identification of active codes, a soft-symbols memory communicably coupled to the despread module, and a respread module that receives the identification of active codes, a modulation type and gain estimate for the active codes, and soft symbol estimates for the active codes from the soft-symbols memory which is communicably coupled to the respread module, the despread module, comprising: a despread signal memory that receives the descrambled signal, a vector code despread module communicably coupled to the despread signal memory, an active code soft symbol grabber that receives the identification of active codes and is communicably coupled to the despread signal memory, wherein the despread signal memory receives properly arranged despread data from the vector code despread module, wherein if the despread data is associated with the identification of active codes, the active code soft symbol grabber transfers the desp

Abstract: A receiver implementing a single carrier single burst equalization (SC-SBE) method is capable of achieving near optimal reception of individual single carrier RF bursts by making an accurate estimate of the burst's propagation channel impulse response (CIR). The SC-SBE method uses a CIR based coefficient computation process to obtain filter coefficients for a minimum mean square error decision feedback equalizer (MMSE-DFE). The MMSE-DFE filter computation process computes a sufficiently large number of coefficients for the DFE filters, i.e., the feed forward filter (FFF) and feedback filter (FBF), so that each filter spans the maximum anticipated length of the CIR. In order to implement the filters efficiently, a coefficient selection process eliminates less significant computed FFF and FBF coefficients. The resulting FFF and FBF are sparse filters in that most of the taps in the filter delay lines do not have a filter coefficient. Such filters may be efficiently implemented in the time domain.

Abstract: A module and method for channel estimate and equalization coefficient based timing recovery comprises a timing estimation module, two channel estimation modules communicably coupled to the timing estimation module, an equalization coefficient computation module communicably coupled to the timing estimation module and one of the channel estimation modules, a conversion module communicably coupled to the timing estimation module and to the two channel estimation modules, and a pulse shaping filter communicably coupled to the conversion module, wherein: the pulse shaping filter receives a signal and outputs a filtered signal, the conversion module receives the filtered signal and outputs two 1/T rate signal streams, a sample time=t stream and a sample time=t?? stream where ? is small compared to T, with each stream going to one of the two channel estimation modules, the channel estimation modules each output a 1/T Channel Impulse Response (CIR) estimate to the timing estimation module, the equalization coefficie

Abstract: A system and method, comprising a despread module that receives a descrambled signal and an identification of active codes, a soft-symbols memory communicably coupled to the despread module, and a respread module that receives the identification of active codes, a modulation type and gain estimate for the active codes, and soft symbol estimates for the active codes from the soft-symbols memory which is communicably coupled to the respread module, the despread module, comprising: a despread signal memory that receives the descrambled signal, a vector code despread module communicably coupled to the despread signal memory, an active code soft symbol grabber that receives the identification of active codes and is communicably coupled to the despread signal memory, wherein the despread signal memory receives properly arranged despread data from the vector code despread module, wherein if the despread data is associated with the identification of active codes, the active code soft symbol grabber transfers the desp

Abstract: A receiver implementing a single carrier single burst equalization (SC-SBE) method is capable of achieving near optimal reception of individual single carrier RF bursts by making an accurate estimate of the burst's propagation channel impulse response (CIR). The SC-SBE method uses a CIR based coefficient computation process to obtain filter coefficients for a minimum mean square error decision feedback equalizer (MMSE-DFE). The MMSE-DFE filter computation process computes a sufficiently large number of coefficients for the DFE filters, i.e., the feed forward filter (FFF) and feedback filter (FBF), so that each filter spans the maximum anticipated length of the CIR. In order to implement the filters efficiently, a coefficient selection process eliminates less significant computed FFF and FBF coefficients. The resulting FFF and FBF are sparse filters in that most of the taps in the filter delay lines do not have a filter coefficient. Such filters may be efficiently implemented in the time domain.

Abstract: A method and apparatus for constructing a model of a sampled transmitted CDMA downlink signal comprises receiving a sampled signal at a first module (810), wherein the signal received at the first module has been filtered, receiving despread symbol data for all possible spread codes at a second module (820) from the first module, determining active codes of the possible spread codes in the filtered sampled signal by the second module, receiving from the first module, the despread symbol data identified with the active codes, at a third module (830), providing estimates of a symbol value and a gain based on the symbol data identified with the active codes by the third module, receiving the symbol value and gain estimates from the third module and the active codes from the second module at a fourth module (840), and constructing a model of the sampled transmitted CDMA downlink signal using the symbol value and gain estimates for the active codes by the fourth module.

Abstract: A receiver implementing a single carrier single burst equalization (SC-SBE) method is capable of achieving near optimal reception of individual single carrier RF bursts by making an accurate estimate of the burst's propagation channel impulse response (CIR). The SC-SBE method uses a CIR based coefficient computation process to obtain filter coefficients for a minimum mean square error decision feedback equalizer (MMSE-DFE). The MMSE-DFE filter computation process computes a sufficiently large number of coefficients for the DFE filters, i.e., the feed forward filter (FFF) and feedback filter (FBF), so that each filter spans the maximum anticipated length of the CIR. In order to implement the filters efficiently, a coefficient selection process eliminates less significant computed FFF and FBF coefficients. The resulting FFF and FBF are sparse filters in that most of the taps in the filter delay lines do not have a filter coefficient. Such filters may be efficiently implemented in the time domain.