165 citations · 198 across the 11 of their papers we have counts for
11 papers · 1 filter
On the Capacity and Performance of Generalized Spatial Modulation
T. Lakshmi Narasimhan, A. Chockalingam
Generalized spatial modulation (GSM) uses antenna elements but fewer radio frequency (RF) chains () at the transmitter. Spatial modulation and spatial multiplexing are speci…
Space-Time Index Modulation
Swaroop Jacob, T. Lakshmi Narasimhan, A. Chockalingam
In this paper, we present a new multi-antenna modulation scheme, termed as {\em space-time index modulation (STIM)}. In STIM, information bits are conveyed through antenna indexing…
Quad-LED and Dual-LED Complex Modulation for Visible Light Communication
T. Lakshmi Narasimhan, R. Tejaswi, A. Chockalingam
In this paper, we propose simple and novel complex modulation techniques that exploit the spatial domain to transmit complex-valued modulation symbols in visible light wireless com…
Coded Index Modulation for Non-DC-Biased OFDM in Multiple LED Visible Light Communication
S. P. Alaka, T. Lakshmi Narasimhan, A. Chockalingam
Use of multiple light emitting diodes (LED) is an attractive way to increase spectral efficiency in visible light communications (VLC). A non-DC-biased OFDM (NDC OFDM) scheme that…
Generalized Spatial Modulation in Large-Scale Multiuser MIMO Systems
T. Lakshmi Narasimhan, P. Raviteja, A. Chockalingam
Generalized spatial modulation (GSM) uses transmit antenna elements but fewer transmit radio frequency (RF) chains, . Spatial modulation (SM) and spatial multiplexing…
Generalized Spatial Modulation in Indoor Wireless Visible Light Communication
S. P. Alaka, T. Lakshmi Narasimhan, A. Chockalingam
In this paper, we investigate the performance of generalized spatial modulation (GSM) in indoor wireless visible light communication (VLC) systems. GSM uses light emitting di…
Precoder Index Modulation
T. Lakshmi Narasimhan, A. Chockalingam
Index modulation, where information bits are conveyed through antenna indices (spatial modulation) and subcarrier indices (subcarrier index modulation) in addition to information b…
Pseudo-random Phase Precoded Spatial Modulation
T. Lakshmi Narasimhan, Yalagala Naresh, Tanumay Datta +1
Spatial modulation (SM) is a transmission scheme that uses multiple transmit antennas but only one transmit RF chain. At each time instant, only one among the transmit antennas wil…
Multiuser SM-MIMO versus Massive MIMO: Uplink Performance Comparison
P. Raviteja, T. Lakshmi Narasimhan, A. Chockalingam
In this paper, we propose algorithms for signal detection in large-scale multiuser {\em spatial modulation multiple-input multiple-output (SM-MIMO)} systems. In large-scale SM-MIMO…
M-ary Detection and q-ary Decoding in Large-Scale MIMO: A Non-Binary Belief Propagation Approach
T. Lakshmi Narasimhan, A. Chockalingam
In this paper, we propose a non-binary belief propagation approach (NB-BP) for detection of -ary modulation symbols and decoding of -ary LDPC codes in large-scale multiuser M…
Channel Hardening-Exploiting Message Passing (CHEMP) Receiver in Large-Scale MIMO Systems
T. Lakshmi Narasimhan, A. Chockalingam
In this paper, we propose a MIMO receiver algorithm that exploits {\em channel hardening} that occurs in large MIMO channels. Channel hardening refers to the phenomenon where the o…