Department of Mathematics
 Search | Help | Login | pdf version | printable version

Math @ Duke



Publications [#235831] of Robert Calderbank

Papers Published

  1. Jana, R; Al-Dhahir, N; Calderbank, R, Distance spectrum computation for equalized MIMO multipath fading channels, 2000 IEEE Wireless Communications and Networking Conference (2000), pp. 293-297
    (last updated on 2018/10/16)

    In this paper we estimate bit error probability bounds for finite-length delay-optimised multi-input multi-output (MIMO) equalizers. These equalizers shorten the impulse response memory of frequency-selective MIMO channels by minimizing the average energy of the error sequence between the equalized MIMO channel impulse response and the target impulse response. We answer an important question in this paper namely, how much asymptotic loss in SNR do we expect as a result of this shortening? A partial distance spectrum for a 2 × 2 MIMO channel is evaluated with or without channel shortening equalizers. The union bound is then used to upper bound the bit error probability. Similarly, the lower bound is computed from the squared minimum Euclidean distance. Numerical results show that the expected loss is in the order of 2.5 dB for realistic wireless channel environments.
ph: 919.660.2800
fax: 919.660.2821

Mathematics Department
Duke University, Box 90320
Durham, NC 27708-0320