| 摘要 |
A wireless relay unit (105) comprises a receive front end (201, 203) generating time domain signal samples for a signal received from a source communication unit (101). A noise processor (205) generates a noise indication for the samples and a quantisation level processor (207) determines quantisation levels such that a noise contribution resulting from quantising relative to the noise indication meets a criterion. A quantisation processor (209) generates quantised signal samples by quantising the samples using the quantisation levels, which are then transmitted (211) to a mobile user unit (103). A receive front end (301, 303, 305, 309) of the mobile user unit (103) generates receive signal samples for the signal from the source communication unit (101) and a MIMO receive processor (311) performs a Multiple In Multiple Out, MIMO, reception of the signal using these samples and the quantised signal samples from the relay unit (105). By combining signals directly from a source unit with those passed through a relay unit, reception quality is improved. |
