A Brief Examination of CQPSK for CPE PHY Modulation

This paper refers to CQPSK modulation as presented in IEEE 802.16.1pp-00/09a and proposed in IEEE 802.16.1pp-00/09. This method is proposed as the modulation scheme for the return channel. Abstract The CQPSK modulation scheme is evaluated for fundamental channel performance. Simulation results are compared for CQPSK and GMSK, which is a very similar method in common use. Power efficiency is evaluated relative to theoretical limits, and spectral efficiency is compared between the two schemes and QPSK. Purpose Third party evaluation to aid in assessment of 802.16 PHY proposals. Notice This document has been prepared to assist IEEE 802.16. It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein. Release The contributor acknowledges and accepts that this contribution may be made public by 802.16. IEEE Patent Policy The contributor is familiar with the IEEE Patent Policy, which is set forth in the IEEE-SA Standards Board Bylaws and includes the statement: " IEEE standards may include the known use of patent(s), including patent applications, if there is technical justification in the opinion of the standards-developing committee and provided the IEEE receives assurance from the patent holder that it will license applicants under reasonable terms and conditions for the purpose of implementing the standard. "