Proceedings ArticleDOI
Joint synchronization and decoding for photon-limited optical channels: code design and complexity reduction
Shu-Ming Tseng,Mark R. Bell,Hsin-lung Lee +2 more
- Vol. 2, pp 1162-1166
Reads0
Chats0
TLDR
This work proposes a two-stage joint synchronizer and decoder that achieve a selected performance requirement while reducing the complexity of joint synchronized and decoded sequences in the deep-space photon-limited optical channel.Abstract:
In this work, we will consider the problem of joint symbol synchronization and decoding of pulse position modulation (PPM) sequences in the deep-space photon-limited optical channel, where joint synchronization and decoding is significantly superior to separate synchronization and decoding. We also consider the design of codes having both good error control and synchronization properties for use with PPM signaling on this channel. While schemes for joint synchronization and decoding on this channel have been previously investigated, the complexity of these schemes has been prohibitive. In addition, their optimality with respect to computational complexity depends on the assumption that symbols are statistically independent and hence uncoded. We propose a two-stage joint synchronizer and decoder that achieve a selected performance requirement while reducing the complexity of joint synchronizer and decoder. The complexity is reduced by terminating synchronization once this error probability requirement is achieved, at which point the synchronizer/decoder functions only as a decoder on the remaining symbols in the received sequences. Therefore, the proposed scheme has practical complexity in the deep-space photon-limited optical channel, which may be used in the future deep-space missions.read more
Citations
More filters
Journal ArticleDOI
Optical Beam Position Tracking in Free-Space Optical Communication Systems
TL;DR: This paper proposes the following filtering methods for tracking the beam position: a Kalman filter and a particle filter that both use the maximum likelihood estimate of stationary beam position as a measurement in a linear dynamical model setting, and another particle filter which employs the received photon counts as observations for the nonlinear dynamical models.
Journal ArticleDOI
Optical beam position estimation in free-space optical communication
TL;DR: Simulation results show that the maximum likelihood estimate achieves the lowest mean square error and especially performs significantly better than center of gravity under poor signal-to-noise ratio conditions, for both the continuous and discrete/quantized arrays.
Journal ArticleDOI
Assessment of Similarity Between Well Logs Using Synchronization Measures
TL;DR: In this letter, similarity measures based on the concept of synchronization as used in matching nonlinear signals such as chaotic time series data are introduced.
Proceedings ArticleDOI
Throughput Analysis of 2-D OCDMA/Pure ALOHA/CLSP Networks with Variable Length Message
Shu-Ming Tseng,Chun-Kuei Chang +1 more
TL;DR: The results demonstrate the OCDMA/ pure ALOHA systems/CLSP with variable message length has higher throughput than [3].
Journal ArticleDOI
Joint Symbol Synchronization and Turbo Decoding for Photon-limited Optical PPM Channels
TL;DR: The simulation results show that the proposed re-synchronization mechanism is not far off from that of perfect symbol synchronization and decoding in turbo-coded pulse-position modulation (PPM) optical communication systems in photon-limited channels.
References
More filters
Book
Error Control Systems for Digital Communication and Storage
TL;DR: This work has shown that polynomials over Galois Fields, particularly the Hadamard, Quadratic Residue, and Golay Codes, are good candidates for Error Control Coding for Digital Communication Systems.
Book
Digital Modulation and Coding
TL;DR: The basic principles of Probability and Information Theory are studied, as well as some exercises, forumerical evaluation of Transfer Function Bounds.
Journal ArticleDOI
Optical Channels: Practical Limits with Photon Counting
TL;DR: In optical communication, ideal amplification of the received signal leads to a limiting signaling rate of 1 nat per photon, which is much inferior to the optimum limit of kT joules/nat, which the authors can theoretically approach by counting photons.
Journal ArticleDOI
Practical codes for photon communication
TL;DR: Even assuming a noiseless model for photon communication for which capacity is infinite, it is unlikely that a signaling efficiency of even 10 nats/photon could be achieved practically, and it is shown that pulse-position modulation plus Reed-Solomon coding yields practical results in the range of 2 to 3 nats-photon.
Journal ArticleDOI
The capacity of the photon counting channel
TL;DR: The capacity of the single-mode photon-counting channel in the region in which quantum effects are most pronounced is high enough to suggest that photon counting be seriously considered for applications such as a deep space to near Earth link.
Related Papers (5)
Symbol-Level Synchronization and LDPC Code Design for Insertion/Deletion Channels
Low-complexity serially-concatenated coding for the deep space optical channel
Bruce Moision,Jon Hamkins +1 more