280 search results - page 21 / 56 » Modulation and Coding for Noncoherent Communications |
ICC
2007
IEEE
14 years 1 months ago
2007
IEEE
— We present an optimization method for unequal error protection (UEP)-LDPC codes with higher order constellations. By modifying the density evolution algorithm under the Gaussia...
ICC
2008
IEEE
14 years 1 months ago
2008
IEEE
—Multiple input multiple output (MIMO) system has been recognized as a promising candidate for future wireless communication. The adaptive modulation which adjusts the transmitte...
ICC
2007
IEEE
14 years 1 months ago
2007
IEEE
In this paper, we consider a deadline constrained traffic and analyze the joint effects of packet queuing and adaptive modulation (AM) for packet transmission in MIMO systems. We p...
ICC
2000
IEEE
13 years 11 months ago
2000
IEEE
Abstract—We describe two classes of simple, effective techniques for reducing the average optical power requirement in intensity-modulated optical systems using multiple BPSK or ...
GLOBECOM
2007
IEEE
13 years 9 months ago
2007
IEEE
: The improvement of spectral efficiency comes at the cost of exponential increment of signal processing complexity [1]. Hence, the energy-efficiency of baseband has recently turne...