Improving capacity in MIMO systems with asynchronous PAM Export

@inproceedings{citeulike:4549491, abstract = {Consider a multiple input multiple output (MIMO) system, where each transmit antenna uses pulse amplitude modulation (PAM), possibly with an antenna dependent delay introduced deliberately at the transmitter. We show that under commonly used transmitter spectral mask constraints, the channel has unbounded degrees of freedom. While synchronous PAM exploits only a fixed number of these degrees of freedom, asynchronism exploits them to improve capacity. For most cases of interest, two distinct shifts attain most of the capacity improvements. Spectrum analysis suggests that asynchronism with optimal water-filling based schemes are useful for improving capacity only in directional links, while uniform power allocation leads to capacity improvement without any extra spectral leakage.}, author = {Barman, K. and Dabeer, O.}, booktitle = {Information Theory and Its Applications, 2008. ISITA 2008. International Symposium on}, citeulike-article-id = {4549491}, citeulike-linkout-0 = {http://dx.doi.org/10.1109/ISITA.2008.4895525}, citeulike-linkout-1 = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=4895525}, day = {10}, doi = {10.1109/ISITA.2008.4895525}, journal = {Information Theory and Its Applications, 2008. ISITA 2008. International Symposium on}, month = {December}, pages = {1--6}, posted-at = {2009-05-20 04:54:40}, priority = {2}, title = {Improving capacity in MIMO systems with asynchronous PAM}, url = {http://dx.doi.org/10.1109/ISITA.2008.4895525}, year = {2008} }

TY - CONF ID - citeulike:4549491 L3 - citeulike-article-id:4549491 N2 - Consider a multiple input multiple output (MIMO) system, where each transmit antenna uses pulse amplitude modulation (PAM), possibly with an antenna dependent delay introduced deliberately at the transmitter. We show that under commonly used transmitter spectral mask constraints, the channel has unbounded degrees of freedom. While synchronous PAM exploits only a fixed number of these degrees of freedom, asynchronism exploits them to improve capacity. For most cases of interest, two distinct shifts attain most of the capacity improvements. Spectrum analysis suggests that asynchronism with optimal water-filling based schemes are useful for improving capacity only in directional links, while uniform power allocation leads to capacity improvement without any extra spectral leakage. JF - Information Theory and Its Applications, 2008. ISITA 2008. International Symposium on EP - 6 TI - Improving capacity in MIMO systems with asynchronous PAM T2 - Information Theory and Its Applications, 2008. ISITA 2008. International Symposium on SP - 1 AU - Barman, K AU - Dabeer, O PY - 2008/12/10/ UR - http://dx.doi.org/10.1109/ISITA.2008.4895525 ER -