Patent ID: 7738593
Filing Date: 2010-06-15
Classification: H04L

Abstract:
1. A base station including a transmitter, the transmitter comprising: means for receiving independent digital signals (‘I’, ‘Q’) to be transmitted; a digital-to-analog converter (DAC) configured to convert the independent digital signals to analog signals; an up-convector to up-convert the analog signals to a single radio frequency signal; and an analog channel filter configured to filter the up-converted analog signals, and a digital pre-equaliser filter coupled before the DAC, and configured to filter the received independent digital signals, wherein the digital pre-equaliser filter comprises a first digital filter and a second digital filter configured to apply complex coefficients to the received independent digital signals and adjust a combined response of the digital pre-equaliser filter and analog channel filter to a desired centre frequency of operation to provide asymmetric equalisation of the received independent digital signals.