The research on noncherent receivers

Noncherent recerivers are the way for the communication systems which not only their transimtters but also receivers don't have channel state information (CSI). The approach has been discussed for single-input-single-output, multiple-anttenas, frequency-selective and frequency-flat channel models. I strong recommand several papers for people who are interesting in this topic. They are related to codes construction, error probability analysis and channel capacity for noncoherent receivers.

Code construction:
[1] M. Skoglund, J. Giese and S. Parkvall, "Code design for combined channel estimation and error protection", IEEE Trans. Inform. Theory, vol. 48, pp. 1162-1171, May 2002.
[2] J. Giese and M. Skoglund, "Space-time code design for unknow frequency-selective channels", in Proc. IEEE Int. Conf. Acoust., Speech, Signal Process., Orlando, FL, USA, May 2002.
[3] J. Giese and M. Skoglund, "Single- and multiple-antenna constellations for communication over unknown frequency-selective fading channels", IEEE Trans. Inform. Theory, vol. 53, pp. 1584-1594, April 2007.

Error probability analysis:

[4] M. Brehler and M. Varanasi, "Asymptotic error probability analysis of quadratic receivers in Rayleigh-fading channels with applications to a unified analysis of coherent and noncoherent space–time Receivers", IEEE Trans. Inform. Theory, vol. 47, pp. 2383-2399, September 2001.

Channel capacity:

[5] L. Zheng, D. N. C. Tse, "Communication on the Grassmann Manifold: a geometric approach to the noncoherent multiple-antenna channel", IEEE Trans. Inform. Theory, vol. 48, pp. 359-383, February 2002.
[6] T. L. Marzetta and B. M. Hochwald, "Capacity of a mobile multiple-antenna communication link in Rayleigh flat fading," IEEE Trans. Inform. Theory, vol. 45, no 1, pp. 139-157, Jan. 1999.

I also have submitted a paper on this topic, you can read the content of my draft in the following hyperlink:
http://arxiv.org/abs/0712.2587