Reducing out-of-band emission

摘要

Disclosed is a transmitter for a communication system. The transmitter comprises a sidelobe suppression module configured to apply a suppression matrix to an input vector comprising symbols to be transmitted by the transmitter; a modulation module configured to modulate the precoded vector to a time-domain symbol using a plurality of subcarriers, each symbol in the precoded vector having a corresponding subcarrier; and a digital-to-analog conversion module configured to convert the time-domain symbol to an analog waveform for transmission. The suppression matrix is constructed such that emissions at one or more predetermined suppression distances lying outside a frequency band defined by the subcarriers are set to zero according to a predetermined emission model.

主权项

1. A receiver for a communication system over a channel, the receiver comprising:
a demodulation module configured to convert a time-domain received symbol to a vector of received symbols, each received symbol corresponding to a subcarrier, each subcarrier being a data subcarrier or a reserved subcarrier on which a zero symbol was transmitted; an equalization module configured to:
equalize the received symbol vector based on the characteristics of the channel, andestimate an input symbol vector from the equalized symbol vector; a de-weighting module configured to remove weighting from the estimated input symbol vector; and a de-precoding module configured to remove precoding from the de-weighted input symbol vector.