New design of carrier interferometry OFDM with FFT as spreading codes

被引：12

作者：

Anwar, K ^{[1
]}

Yamamoto, H ^{[1
]}

机构：

[1] Nara Inst Sci & Technol, Grad Sch Informat Sci, 8916-5 Takayama, Nara 6300192, Japan

来源：

2006 IEEE RADIO AND WIRELESS SYMPOSIUM, PROCEEDINGS | 2006年

关键词：

carrier interferometry; spreading codes; OFDM; computational complexity; FFT;

D O I：

10.1109/RWS.2006.1615214

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this paper, we propose a new design of efficient carrier interferometry orthogonal frequency division multiplexing (CI/OFDM) by using fast Fourier transform (FFT) as spreading codes. First, we propose the use of both positive and negative frequency of the IFFT rather than only using the positive part as in conventional method. It results new CI/OFDM waveforms which only requires a half of FFT points. Second, we replace Cl spreading with FFT for achieving lower complexity because complexity of CI is similar to that of discrete Fourier transform (DFT). Our results confirm that the proposed design is capable of achieving high efficiency and low complexity while providing high performance.

引用

页码：543 / 546

页数：4