Radio communication device and semiconductor integrated circuit device used for the same

摘要

A semiconductor integrated circuit for a radio communication terminal sequentially uses a plurality of frequency channels by instructions from a hopping frequency decision unit to receive packet data by a reception unit. When the integrated circuit cannot detect the head of the packet data in reception operations, the integrated circuit cannot receive packet data should be received originally then assumes that the received packet data is a packet error. And the integrated circuit calculates packet error rates for each frequency channel on the basis of the number of times of reception operations performed for each frequency channel and of the number of times of packet errors to estimate channel qualities by using the packet error rates.

主权项

1. A semiconductor device comprising:
a hopping frequency decision unit selecting one frequency channel from among a plurality of frequency channels; a reception unit receiving packet data of the selected frequency channel, counting the number of receptions of packet data at the selected frequency channel; an error detection unit detecting a packet synchronization error and a synchronization detection error at the selected frequency channel, summing the number of packet synchronization errors and the number of synchronization detection errors; a controller calculating a packet error rate for each of the frequency channels based on the number obtained by summing the number of packet synchronization errors and the number of synchronization detection errors, and the number of receptions, evaluating a channel quality by using the packet error rate; and a transmission unit transmitting packet data by using the selected frequency channel.