Coherent Viterbi and threshold demodulators for pulse-driven GMSK signals

Tsai, Kuang; Lui, G.L.

doi:10.1109/milcom.1999.822690

Cited by 2 publications

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Performance of coded Gaussian minimum shift keying

Kerr

Crozier

IEEE Military Communications Conference, 2003. MILCOM 2003.

View full text Add to dashboard Cite

In this paper, we present bit error performance for coded Gaussian minimum shifr keying (GMSK). We consider the case where the communication channel consists of one o r more partialprocessing satellite links. The satellite on-board processor can demodulate, repacketize and remodulate the incoming data prior to transmission. We model the system by a cascade of binary symmetric channels followed by an additive white Gaussian noise channel. We investigate the performance of a Turbo-code with two 16-state component codes and convolutional codes f o r this application through simulation. The interleaver design f o r Turbo-codes is essential and we considerdithered relative prime interleavers, which have excellent flare performance.

show abstract

Performance of coded Gaussian minimum shift keying

Kerr

Crozier

IEEE Military Communications Conference, 2003. MILCOM 2003.

View full text Add to dashboard Cite

show abstract

An Architecture for High Data Rate Very Low Frequency Communication

Кумар

Bahl

2013

DSJ

View full text Add to dashboard Cite

The very low frequency (VLF) band of 3 kHz to 30 kHz is used for strategic long range communication from shore to ship, in particular, near-surface submarines. The navies of various countries place a lot of importance to the use of VLF band for broadcasting information to submarines. It is thus a simplex mode of communication. The allocated bandwidth is typically limited to the order of 200 Hz. Because of the limited bandwidth, the message source is only text or data and not voice. Classically, frequency shift keying (FSK) and minimum shift keying (MSK) have been used as the modulation techniques for VLF communication with data rates of 50-200 bps. In this paper, authors report the design of an architecture for high data rate VLF communication between 400-800 bps. The key elements of the high data rate communication system are Gaussian minimum shift keying (GMSK) modulation and low delay parity check (LDPC) channel coding. The architecture is completely non-data aided. Thus, carrier phase synchronization, timing recovery, and LDPC frame synchronization algorithms use properties of the signal rather than preamble or header data to perform the respective tasks. The block level description of the communication transmitter and receiver is given in Fig. 1. The transmitter encodes the non-return to zero (NRZ) source data using LDPC codes. The coded data is modulated using GMSK and is transmitted. The output of the source block is assumed to be source encoded. The receiver chain begins with a pass-band analog antenna filter which limits the signal and noise in the band of the signal. The signal enhancement block filters the signal to reduce the atmospheric radio noise (ARN) component. The output is passed through an IF filter with a bandwidth

show abstract

Coherent Viterbi and threshold demodulators for pulse-driven GMSK signals

Cited by 2 publications

References 6 publications

Performance of coded Gaussian minimum shift keying

Performance of coded Gaussian minimum shift keying

An Architecture for High Data Rate Very Low Frequency Communication

Contact Info

Product

Resources

About