Patent ID: 7885344
Filing Date: 2011-02-08
Classification: H04B,H04L

Abstract:
1. A multiband orthogonal frequency division multiplexing wireless communication apparatus that performs multiband communication in which frequency hopping is performed for orthogonal frequency division multiplexing symbols using a plurality of subbands obtained by dividing a frequency band, the wireless communication apparatus comprising: a receiver that sets a dead band region in the vicinity of a boundary between the plurality of subbands and that receives incoming signals on which the frequency hopping is performed, the receiver comprising an interference detector that detects interference with an outside communication system in a frequency band region of the outside communication system, the interference being detected after the orthogonal frequency division multiplexing demodulation is performed; and a transmitter that reduces the noise floor in the dead band region to a predetermined level or less and that transmits outgoing signals, the transmitter comprising an interference avoidance unit that transmits the outgoing signals while avoiding the interference in the frequency band region detected by the interference detector, and configured to implement a zero-intermediate frequency method in which frequency conversion is performed using a local signal having a frequency based on a carrier frequency of the outgoing signals and digital transmission signals are converted into the outgoing signals with a signal-to-noise ratio of less than or equal to a predetermined value.