RADIO TRANSMISSION APPARATUS, RADIO RECEPTION APPARATUS, AND RADIO TRANSMISSION METHOD

摘要

The multiplexing number of a code division multiplexing signal transmitted by each sub−carrier is selected for each sub−carrier. As a result, a code division multiplexing signal arranged on a sub−carrier (G1) having a small signal multiplexing number has less inter−code interference on the transmission path, resulting in less deterioration on the transmission path as compared to the transmission signal arranged on a sub−carrier having a large multiplexing number. Thus, as compared to a case when the signal multiplexing number is uniformly decided for all the sub−carriers, it is possible not to lower the frequency use efficiency so much and prevent deterioration of error rate characteristic of important information, thereby obtaining both of the frequency use efficiency and a desired error rate characteristic.