Patent 7539157 was granted and assigned to NEC Corporation on May, 2009 by the United States Patent and Trademark Office.
In absence of user data, a bit extracting portion 6 treats pilot bits as pseudo user data and delivers the pilot bits to a pilot converting portion 7. The pilot converting portion 7 carries out symbol rotation with reference to a bit pattern in case where CRC bits alone are transmitted. Those symbols are decoded by a deinterleaving portion 8 and an error correcting portion 9. A CRC judging portion 10 carries out CRC judgment.