Antipodal paraunitary matrices and their application to OFDM systems

Authors:
S.-M. Phoong;Kai-Yen Chang
Affiliations:
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan;-
Venue:
IEEE Transactions on Signal Processing
Year:
2005

Citing 0
Cited 1

Paraunitary generation/correlation of QAM complementary sequence pairs

Cryptography and Communications

Quantified Score

Hi-index	35.68

Visualization

Abstract

Paraunitary (PU) matrices and filterbanks have played an important role in many applications. This paper studies a special class of PU matrices, called antipodal paraunitary (APU) matrices. APU matrices are PU matrices whose coefficient matrices consist of ±1 only. Several new methods will be introduced for the construction of APU matrices. In particular, a new method based on the butterfly structure that has a low cost implementation is proposed. Moreover, one application of APU matrices in precoded orthogonal frequency division multiplexing (OFDM) systems will be considered. By using an APU precoding matrix, the complexity will be very low, and experiments show that the use of APU matrices can greatly enhance the performance.