Low-Complexity Doubly Selective Channel Simulation Using Multidimensional Discrete Prolate Spheroidal Sequences
نویسندگان
چکیده
This paper presents a low-complexity algorithm for the simulation of time-variant frequency-selective geometry based channel models. The algorithm approximately calculates the time-variant transfer function of the channel in the subspace spanned by multidimensional discrete prolate spheroidal (DPS) sequences. The only parameters of the subspace are the maximum Doppler shift and the maximum delay of the channel as well as the channel bandwidth and the observed time interval. By adjusting the dimension of the subspace, it is possible to trade complexity for accuracy. On a 16 bit fixed-point arithmetic processor, the computational complexity can be reduced by an order of magnitude compared to a conventional sum-of-sinusoids implementation.
منابع مشابه
Time-Variant Channel Equalization via Discrete Prolate Spheroidal Sequences
In this work we present an equalization scheme for a multi-carrier (MC) code division multiple access (CDMA) communication system that is operated in a frequency-selective time-variant (TV) channel. For block oriented data transmission we are interested to describe the TV channel for the duration of a data block with the smallest amount of parameters possible. Slepian showed that time-limited p...
متن کاملLow-Complexity Geometry-Based MIMO Channel Simulation
The simulation of electromagnetic wave propagation in time-variant wideband multiple-input multiple-output mobile radio channels using a geometry-based channel model (GCM) is computationally expensive. Due to multipath propagation, a large number of complex exponentials must be evaluated and summed up. We present a low-complexity algorithm for the implementation of a GCM on a hardware channel s...
متن کاملOrthogonal Precoding for Ultra Reliable Wireless Communication Links
All diversity sources of a wireless communication channel must be utilized to enable ultrareliable wireless communication links. Hadani et al. propose the two dimensional discrete symplectic Fourier transform (DSFT) as orthogonal pre-coder for orthogonal frequency division multiplexing (OFDM) in timeand frequency-selective channels. In this paper we investigate general orthogonal precoding (OP)...
متن کاملOn the Use of Discrete Prolate Spheroidal Windows for Frequency Selective Filter Design
The FIR filter design problem is considered with respect to a combined integrated squared error-Chebyshev error criterion. Truncation of the DTFT of the desired frequency response with tapered windows is introduced and the discrete prolate spheroidal window is shown to be a good window for this purpose, due to its optimal mainlobe width-sidelobe energy tradeoff. The discrete prolate spheroidal ...
متن کاملLow Complexity Simulation of Wireless Channels Using Discrete Prolate Spheroidal Sequences
The modeling and simulation of wireless mobile communication channels is very important for the design and testing of receiver algorithms. Especially for the testing of mobile radio hardware devices, real-time implementations of such channel models are required. This work presents a low-complexity algorithm for the simulation of time-variant flat-fading channels. The new method is based on a su...
متن کامل