TY - GEN
T1 - LDPC-coded optical communication over the atmospheric turbulence channel
AU - Djordjevic, Ivan B.
PY - 2007
Y1 - 2007
N2 - The free-space optical (FSO) systems that are robust in the presence of atmospheric turbulence are discussed in this invited paper: (i) coded orthogonal frequency division multiplexing (OFDM), and (ii) coded multiple-input multipleoutput (i.e., multi-laser multi-detector or MIMO) concept; both employing low-density parity-check (LDPC) codes. Two MIMO concepts are discussed: (i) repetition-MIMO, and (ii) space-time coded-MIMO. The second goal of this paper is to discuss the incompatibility that arises from the bandwidth mismatch between RF/microwave and optical channels. We describe two coded modulation schemes suitable for hybrid microwave-optical communications: (i) coded-OFDM as multiplexing technique, and (ii) Q-ary bit-interleaved coded pulse-amplitude modulation. The third goal of this paper is to describe the ultimate channel capacity limits, and to see how close we can approach those limits with proposed coded-MIMO concepts.
AB - The free-space optical (FSO) systems that are robust in the presence of atmospheric turbulence are discussed in this invited paper: (i) coded orthogonal frequency division multiplexing (OFDM), and (ii) coded multiple-input multipleoutput (i.e., multi-laser multi-detector or MIMO) concept; both employing low-density parity-check (LDPC) codes. Two MIMO concepts are discussed: (i) repetition-MIMO, and (ii) space-time coded-MIMO. The second goal of this paper is to discuss the incompatibility that arises from the bandwidth mismatch between RF/microwave and optical channels. We describe two coded modulation schemes suitable for hybrid microwave-optical communications: (i) coded-OFDM as multiplexing technique, and (ii) Q-ary bit-interleaved coded pulse-amplitude modulation. The third goal of this paper is to describe the ultimate channel capacity limits, and to see how close we can approach those limits with proposed coded-MIMO concepts.
KW - Atmospheric turbulence
KW - Direct detection
KW - Free-space optical (FSO) communications
KW - Low-density parity-check (LDPC) codes
KW - Multiple-input multiple output (MIMO)
KW - Orhtogonal frequency division multiplexing (OFDM)
KW - Space-time coding
UR - http://www.scopus.com/inward/record.url?scp=50249171141&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=50249171141&partnerID=8YFLogxK
U2 - 10.1109/ACSSC.2007.4487567
DO - 10.1109/ACSSC.2007.4487567
M3 - Conference contribution
AN - SCOPUS:50249171141
SN - 9781424421107
T3 - Conference Record - Asilomar Conference on Signals, Systems and Computers
SP - 1903
EP - 1909
BT - Conference Record of the 41st Asilomar Conference on Signals, Systems and Computers, ACSSC
T2 - 41st Asilomar Conference on Signals, Systems and Computers, ACSSC
Y2 - 4 November 2007 through 7 November 2007
ER -