Grant: Discovery Grants Program - Individual

Pseudorandom sequences with low correlation are the key factor for reducing mutual interference among multiple users sharing common resources in code-division multiple access (CDMA) systems. On the other hand, error correcting codes play crucial roles for highly reliable communications over noisy channels. I. Polyphase Sequence Design for Multicarrier Communications Polyphase sequences are the sequences of integers in a finite set, which are suitable for variable rate multicarrier communications. The proposed research includes developing new polyphase sequences with various alphabet sizes and good correlation, and studying their correlation and power characteristics for the applications to wireless communications. The achievements of this research will contribute to the performance improvements of future wireless communication systems by reducing mutual interference among multiple users or channels and increasing the efficiency of power amplification. II. Error Correcting Codes of Short Block Lengths In wireless communications, the control information of short block lengths contains critical system information and parameters. Thus, it must be protected by a powerful error correcting code and decoded by the fast decoding algorithm. The proposed research includes developing new error correcting codes of short block lengths along with their fast decoding algorithms and studying their properties for practical wireless communications. This research will contribute to more reliable transmission of control information in a delay-sensitive communication system.