CACB-Q2PSK Modulation for Efficient Bandwidth Utilization and Constant Amplitude Signal Transmission

Amplitude Modulation Filters as Feature Sets for Robust ASR: Constant Absolute or Relative Bandwidth?

Many research efforts in the field of feature extraction for automatic speech recognition are focused on analyzing slow amplitude fluctuations of speech. In this study the importance of spectral and temporal resolution for the amplitude modulation frequency analysis are investigated in order to provide guidance for the appropriate filter design. Therefore, different wavelet and Fourier transfor...

Bandwidth-Efficient Modulation

The recent proliferation of terrestrial and space-based communication systems has given rise to an increasingly critical problem—the lack of available frequency spectrum. One tool that satellite system designers can use to maximize the use of available spectrum is bandwidth-efficient modulation. This technique can enhance bandwidth efficiency while retaining reasonable power efficiency and impl...

A Novel approach for efficient bandwidth utilization by employing different multicarrier modulation and MIMO

The main 4 generation long term evolution (LTE) techniques employed are Multicarrier Modulation method and Multiple Input Multiple Output (MIMO). Multiple carriers is able to deliver elevated level of spectral efficiency as compared to other multiplexing techniques by using Orthogonal frequency division multiplexing (OFDM) . In OFDM if the timing offset is outrageous then intercarrier interfere...

Ccsds - Sfcg Efficient Modulation Methods Study a Comparison of Modulation Schemes Phase 1: Bandwidth Utilization

An Efficient Hierarchical Modulation based Orthogonal Frequency Division Multiplexing Transmission Scheme for Digital Video Broadcasting

Due to the increase of users the efficient usage of spectrum plays an important role in digital terrestrial television networks. In digital video broadcasting, local and global content are transmitted by single frequency network and multifrequency network respectively. Multifrequency network support transmission of global content and it consumes large spectrum. Similarly local content are well ...