A signal space detector is a low-complexity approximation of fixed-delay tree search with decision feedback (FDTS/DF). This paper proposes the simplest version possible of a τ = 2 FDTS/DF for a minimum run-length constraint of d = 2. The hardware needs only two multiplications and additions, facilitating high data-rate/low-complexity implementations. Simulation results show that the performance of the proposed detector equals that of the τ = 2 FDTS/DF even when jitter noise is present. It is shown that for d = 2, a partial response maximum-likelihood detector with the target response ∑k=03 Dk outperforms one with (1 + D)3 because of good spectral matching at normalized density S ≥ 4.6.
Bibliographical noteFunding Information:
Manuscript received December 3, 2001; revised May 1, 2002. This work was supported by the Korea Science and Engineering Foundation. The authors are with the Information and Telecommunication Lab, Department of Electrical and Electronic Engineering, Yonsei University, 120-749 Seoul, Korea. Digital Object Identifier 10.1109/TMAG.2002.802703.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering