Results 371 to 380 of about 5,341,111 (402)

Differential Subcarrier Index Modulation

IEEE Transactions on Vehicular Technology, 2018
One of the main challenges in orthogonal frequency division multiplexing (OFDM)–subcarrier index modulation (SIM) systems is the huge amount of resources required to obtain channel state information at the receiver side. In this paper, a differential subcarrier index modulation (DSIM) scheme is proposed, which entirely avoids the need for any channel ...
Saud Althunibat, Raed Mesleh, Ertugrul Basar   +2 more
openaire   +2 more sources

Index Modulation Multiple Access

2018 IEEE 29th Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), 2018
In this paper, the use of index modulation (IM) technique for non-orthogonal multiple access (NOMA) is presented, called the Index Modulation multiple access (IMMA). From the concept of index modulation, IMMA technique uses the active subcarriers and inactive subcarriers to make index indices.
Jen-Ming Wu, Yi-Ruei Ciou, Yung-Ta Lai
openaire   +2 more sources

Code-Based Index Modulation

2021
In this chapter, we introduce a novel code-based index modulation technique for orthogonal frequency division multiplexing (OFDM), named index modulated OFDM spread spectrum (IM-OFDM-SS), which utilizes the indices of spreading codes to convey information in addition to conventional constellation symbols. We first present the system model of IM-OFDM-SS,
Xiang Cheng, Miaowen Wen, Qiang Li
openaire   +2 more sources

Performance Analysis of Index Modulation

SSRN Electronic Journal, 2019
Multicarrier Transmission is an important technology for wireless and wideband digital communication systems. It becomes quite easy to eavesdrop or disrupt a wireless network with noise and interferences. These difficulties were tackled through encryption and cryptography. The development of 5G and beyond wireless networks can support massive number of
Mansi Nikam, Sagar Virkar, Namita Agarwal, Sohan Juvale, Aditya Singh   +4 more
openaire   +2 more sources

Subcarrier-index modulation OFDM

2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications, 2009
A new transmission approach, referred to as subcarrier-index modulation (SIM) is proposed to be integrated with the orthogonal frequency division multiplexing (OFDM) systems. More specifically, it relates to adding an additional dimension to the conventional two-dimensional (2-D) amplitude/phase modulation (APM) techniques, i.e. amplitude shift keying (
Harald Haas, Rami Abu-alhiga
openaire   +1 more source

In-Phase and Quadrature Index Modulation Aided OTFS Transmission

IEEE Communications Letters, 2022
Dan Feng, Jianping Zheng, B. Bai, Jing Jiang, Ling Zheng   +4 more
semanticscholar   +1 more source

Variation of Bandwidth with Modulation Index in Frequency Modulation

Proceedings of the IRE, 1947
Equations are derived for the carrier and side-frequency amplitudes which are obtained when a carrier wave is frequency-modulated by a complex audio signal. The bandwidth occupied by such a frequency-modulated wave is defined as the distance between the two frequencies beyond which none of the side frequencies is greater than 1 per cent of the carrier ...
openaire   +2 more sources

Space Domain Index Modulation

2016
In this chapter, we discuss the realization of index modulation in the space domain. First, we take a brief review of the pioneering space domain index modulation technique, namely spatial modulation (SM). Then, we propose the generalized pre-coding aided quadrature spatial modulation (GPQSM) scheme, which extends SM to the receiver side, and the ...
Liuqing Yang, Miaowen Wen, Xiang Cheng
openaire   +2 more sources

Quantization index modulation: a class of provably good methods for digital watermarking and information embedding

2000 IEEE International Symposium on Information Theory (Cat. No.00CH37060), 2000
Brian Chen, G. Wornell
semanticscholar   +1 more source

Frequency Domain Index Modulation

2016
Chapters 2 and 3 discuss how index modulation operates in the space and space-time domains, respectively. In this chapter, we focus on the implementation of index modulation in the frequency domain. First, the orthogonal frequency division multiplexing with index modulation (OFDM-IM), which is a representative of this sort, is introduced.
Miaowen Wen, Liuqing Yang, Xiang Cheng
openaire   +2 more sources