Fundamentals of statistical signal processing: estimation theory
Fundamentals of statistical signal processing: estimation theory
Convex Optimization
Minimizing the Peak-to-Average Power Ratio of OFDM Signals Using Convex Optimization
IEEE Transactions on Signal Processing
Channel estimation for space-time orthogonal block codes
IEEE Transactions on Signal Processing
A comparison of pilot-aided channel estimation methods for OFDMsystems
IEEE Transactions on Signal Processing
IEEE Transactions on Signal Processing
Superimposed training for OFDM: a peak-to-average power ratio analysis
IEEE Transactions on Signal Processing - Part I
Optimal design and placement of pilot symbols for channel estimation
IEEE Transactions on Signal Processing
Optimal training for MIMO frequency-selective fading channels
IEEE Transactions on Wireless Communications
Optimal placement of training for frequency-selective block-fading channels
IEEE Transactions on Information Theory
Pilot tone selection for channel estimation in a mobile OFDM system
IEEE Transactions on Consumer Electronics
Transmission techniques for digital terrestrial TV broadcasting
IEEE Communications Magazine
OFDM channel estimation performance under channels with a peak power constraint
MILCOM'09 Proceedings of the 28th IEEE conference on Military communications
Distributed multiple antenna carrier and sampling-frequency synchronization for OFDM
MILCOM'09 Proceedings of the 28th IEEE conference on Military communications
Hi-index | 0.01 |
Pilot symbol assisted modulation (PSAM) orthogonal frequency division multiplexing (OFDM) has proven to be a popular technique for high-speed communication through multipath fading channels. In this paper we examine PSAM pilot design optimization in OFDM systems that employ edge null subcarriers for spectral shaping. Specifically, we show that the commonly used even pilot spacing design is suboptimal in terms of symbol estimate mean squared error (MSE) performance when a sufficient number of null subcarriers are present. We pursue a parametric design of the pilot spacings and use convex optimization techniques in order to find a pilot design that results in near-optimal symbol estimate MSE performance. Finally, we present several example PSAM OFDM pilot designs including one example based on the IEEE 802.16 standard to demonstrate performance improvements over the conventional even-spacing pilot design when null edge subcarriers are present.