상세정보
학술지
Constellation Design for Bit-Interleaved Coded Modulation (BICM) Systems in Advanced Broadcast Standards
- 발행일
- 201712
- 출처
- IEEE Transactions on Broadcasting, v.63 no.4, pp.603-614
- ISSN
- 0018-9316
- 출판사
- IEEE
- 협약과제
- 17HR2100, 초고품질 UHD (UHQ) 전송 기술 개발, 허남호
- 초록
- This paper presents a generic methodology to optimize constellations based on their geometrical shaping for bit-interleaved coded modulation (BICM) systems. While the method can be applicable to any wireless standard design it has been tailored to two delivery scenarios typical of broadcast systems: 1) robust multimedia delivery and 2) UHDTV quality bitrate services. The design process is based on maximizing the BICM channel capacity for a given power constraint. The major contribution of this paper is a low complexity optimization algorithm for the design of optimal constellation schemes. The proposal consists of a set of initial conditions for a particle swarm optimization algorithm, and afterward, a customized post processing procedure for further improving the constellation alphabet. According to the broadcast application cases, the sizes of the constellations proposed range from 16 to 4096 symbols. The BICM channel capacities and performance of the designed constellations are compared to conventional quadrature amplitude modulation constellations for different application scenarios. The results show a significant improvement in terms of system performance and BICM channel capacities under additive white Gaussian noise and Rayleigh independently and identically distributed channel conditions.
- KSP 제안 키워드
- Additive white Gaussian noise(AWGN), Application scenarios, Broadcast systems, Channel capacity, Design process, Initial conditions, Multimedia Delivery, Particle swarm optimization algorithm, Post-Processing, Power Constraint, Quadrature-amplitude modulation(QAM)