Implemetation of OFDM Ethernet Modem System

Design of a High Data Rate Audio Band OFDM Modem

A Broadband Underwater Acoustic Modem Implementation Using Coherent OFDM

Multicarrier modulation in the form of orthogonal frequency division multiplexing (OFDM) has prevailed in recent broadband wireless systems over radio channels. In this senior design project, we have implemented an acoustic OFDM modem that transmits digital data through sound propagation. We have demonstrated OFDM transmission first in air, and then in water. We find that the underwater channel...

A Multi-levelled OFDM-CDMA Modem Using Complete Complementary Codes

In this paper, we introduce a novel multiple access scheme based on a combination of a multi-levelled modem and multi-carrier techniques with the use of complete complementary codes. This modulation technique combines a multi-dimensional code division multiple access (CDMA) modem with recent designs of perfectly complete complementary orthogonal codes. The rotational properties of the spreading...

Multiband software radio modem using turbo codes and OFDM

This article deals with OFDM transmission associated with turbo codes, in order to realize a software radio modem with several waveforms. Except for the frequency transposition, we show that all the functions can be implemented as software. This modem is adapted for HF, VHF and UHF transmission, depending on the chosen waveform. Simulations and tests in real condition achieve a bit error rate o...

Performance Evaluation of MB-OFDM based UWB System

This paper investigates the Multi-band OFDM (MB-OFDM) based physical (PHY) layer proposal for IEEE 802.15.3a working group on short-range high data-rate Ultra-wide-Band (UWB) communications. An overview of the MB-OFDM PHY layer architecture with its various parameters is presented and the optimal choice of critical parameters is discussed. Next, we derive the theoretical un-coded Bit Error Rate...