System and method for a Krylov Method Symbol equalizer

摘要

Disclosed are various embodiments for a symbol level Krylov method equalizer implemented in a wireless communications device. An HSDPA or WCDMA signal is input to the wireless communications device. A conjugate gradient method is applied to symbol-level samples of the signal until a termination condition is met. The termination condition may comprise having zero residual error, residual error below a threshold, or a specified number of iterations. Additionally, a preconditioning matrix may be applied to the inputs of the conjugate gradient method.

主权项

1. A system for signal processing comprising:
one or more circuits for use in a wireless communication device, wherein the one or more circuits comprise: an interface configured to receive a communications signal ( y) comprising symbol data ( x) and signal noise ( n); and a symbol-level equalizer configured to generate an estimated symbol data by performing an iterative conjugate gradient method as a function of the communications signal and a channel model including channel information (H), wherein the symbol-level equalizer is configured to perform the iterative conjugate gradient method by receiving a scrambling code matrix (S) and a spreading code matrix (C) from a scrambling and spreading code generator, and to determine the symbol data ( x) based on: y=HSC x+ n, wherein the symbol-level equalizer is configured to terminate the iterative conjugate gradient method based on a residual error falling below a predefined threshold.