Abstract: Joint demodulation of a desired transmission and an interfering transmission received from an interfering cell with an unknown combination of transmission parameters is performed. For each subcarrier, an exhaustive search for the serving cell symbols and projection for the interfering cell symbols is performed for tested hypotheses of the interfering cell, by minimizing a whitened noise parabola for each combination of searched hypothesis and hyper constellation point of the serving cell. A constellation point for the interfering cell that is closest to the minimum point of the parabola is selected, where coefficients of the parabola are calculated once for each subgroup of four modulation types of the interfering cell. A measure of likelihood for each of the tested hypotheses is calculated. A cumulative measure of likelihood for each of the tested hypotheses is calculated, and the most likely hypothesis is selected based on the cumulative measure of likelihood.

Abstract: A system and method for performing sample rate conversion by an execution unit, including receiving an instruction, where the instruction comprises an irregular shifting pattern of data elements stored in a vector register, and shifting the data elements in the vector register according to the irregular shifting pattern. In case of upsampling the irregular shifting pattern includes an indication stating whether a memory element loads a data element from an immediate next memory element or from a second next memory element. In case of downsampling the irregular shifting pattern includes an indication stating whether a memory element in the input vector register loads a data element from an immediate next memory element, or whether the memory element loads a data element previously stored in a shadow vector register and the data element stored in the immediate next memory element is loaded into the shadow vector register.

Abstract: Systems and methods for adaptive demodulation of cellular device communications signals are provided. Cellular communications over a Long Term Evolution network can involve determining a demodulations scheme based on a service cell transmission mode, an interfering cell transmission mode, a modulation order (QAM) of interferer and an interference-to-noise ratio of cellular communications signals.

Abstract: Joint demodulation of a desired transmission and an interfering transmission received from an interfering cell with an unknown combination of transmission parameters is performed. For each subcarrier, an exhaustive search for the serving cell symbols and projection for the interfering cell symbols is performed for tested hypotheses of the interfering cell, by minimizing a whitened noise parabola for each combination of searched hypothesis and hyper constellation point of the serving cell. A constellation point for the interfering cell that is closest to the minimum point of the parabola is selected, where coefficients of the parabola are calculated once for each subgroup of four modulation types of the interfering cell. A measure of likelihood for each of the tested hypotheses is calculated. A cumulative measure of likelihood for each of the tested hypotheses is calculated, and the most likely hypothesis is selected based on the cumulative measure of likelihood.

Abstract: Systems and methods for adaptive demodulation of cellular device communications signals are provided. Cellular communications over a Long Term Evolution network can involve determining a demodulations scheme based on a service cell transmission mode, an interfering cell transmission mode, a modulation order (QAM) of interferer and an interference-to-noise ratio of cellular communications signals.

Abstract: A system and method for symmetrical filtering of an input string may include loading, into at least one vector register, in a single read cycle, a subset of right-side data elements and a subset of left-side data elements of the input string. The input string may be stored sequentially in a memory unit. The right-side data elements and the left-side data elements may be equally distant from the center of the input string and may be separated by a whole number of rows in the memory. The system and method may include performing filtering of the input string using a symmetrical filter with the loaded right-side data elements and left-side data elements.

Abstract: A system and method for performing sample rate conversion by an execution unit, including receiving an instruction, where the instruction comprises an irregular shifting pattern of data elements stored in a vector register, and shifting the data elements in the vector register according to the irregular shifting pattern. In case of upsampling the irregular shifting pattern includes an indication stating whether a memory element loads a data element from an immediate next memory element or from a second next memory element. In case of downsampling the irregular shifting pattern includes an indication stating whether a memory element in the input vector register loads a data element from an immediate next memory element, or whether the memory element loads a data element previously stored in a shadow vector register and the data element stored in the immediate next memory element is loaded into the shadow vector register.

Abstract: A system and method for symmetrical filtering of an input string may include loading, into at least one vector register, in a single read cycle, a subset of right-side data elements and a subset of left-side data elements of the input string. The input string may be stored sequentially in a memory unit. The right-side data elements and the left-side data elements may be equally distant from the center of the input string and may be separated by a whole number of rows in the memory. The system and method may include performing filtering of the input string using a symmetrical filter with the loaded right-side data elements and left-side data elements.