Upper and lower bounds on the capacity of wireless optical intensity channels

被引：20
作者：
Farid, Ahmed A. [1 ]
Hranilovic, Steve [1 ]
机构：
[1] McMaster Univ, Dept Elect & Comp Engn, Hamilton, ON, Canada
来源：
2007 IEEE INTERNATIONAL SYMPOSIUM ON INFORMATION THEORY PROCEEDINGS, VOLS 1-7 | 2007年
关键词：
D O I：
10.1109/ISIT.2007.4557581
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：
Improved upper and lower bounds on the capacity of wireless optical intensity channels under non-negativity and average optical power constraints are derived. We consider intensity modulated/direct detection (IM/DD) channels with pulse amplitude modulation (PAM). Utilizing the signal space geometry and a sphere packing argument, an upper bound is derived. Compared to previous work, the derived upper bound is tighter at low signal-to-noise ratios. In addition, a lower bound is derived based on source entropy maximization over discrete distributions. The proposed distribution provides a tighter lower bound compared to previous continuous distributions. The derived bounds asymptotically describe the capacity of PAM optical intensity channels at both low and high SNR.
引用
收藏
页码：2416 / 2420
页数：5
相关论文
共 10 条
[1]  
[Anonymous], 1990, P I ELECTR ENG
[2]   INTRINSIC VOLUMES AND LATTICE POINTS OF CROSSPOLYTOPES [J].
BETKE, U ;
HENK, M .
MONATSHEFTE FUR MATHEMATIK, 1993, 115 (1-2) :27-33
[3]   Capacity-achieving probability measure for conditionally Gaussian channels with bounded inputs. [J].
Chan, TH ;
Hranilovic, S ;
Kschischang, FR .
IEEE TRANSACTIONS ON INFORMATION THEORY, 2005, 51 (06) :2073-2088
[4]   Capacity bounds for power- and band-limited optical intensity channels corrupted by Gaussian noise [J].
Hranilovic, S ;
Kschischang, FR .
IEEE TRANSACTIONS ON INFORMATION THEORY, 2004, 50 (05) :784-795
[5]   Optical intensity-modulated direct detection channels: Signal space and lattice codes [J].
Hranilovic, S ;
Kschischang, FR .
IEEE TRANSACTIONS ON INFORMATION THEORY, 2003, 49 (06) :1385-1399
[6]   Wireless infrared communications [J].
Kahn, JM ;
Barry, JR .
PROCEEDINGS OF THE IEEE, 1997, 85 (02) :265-298
[7]  
Nickalls RWD., 1993, MATH GAZ, V77, P354, DOI [10.2307/3619777, DOI 10.2307/3619777]
[8]   COMMUNICATION IN THE PRESENCE OF NOISE [J].
SHANNON, CE .
PROCEEDINGS OF THE INSTITUTE OF RADIO ENGINEERS, 1949, 37 (01) :10-21
[9]   INFORMATION CAPACITY OF AMPLITUDE- AND VARIANCE-CONSTRAINED SCALAR GAUSSIAN CHANNELS [J].
SMITH, JG .
INFORMATION AND CONTROL, 1971, 18 (03) :203-+
[10]   Upper-bounding the capacity of optical IM/DD channels with multiple-subcarrier modulation and fixed bias using trigonometric moment space method [J].
You, R ;
Kahn, JM .
IEEE TRANSACTIONS ON INFORMATION THEORY, 2002, 48 (02) :514-523
1