The implementation of a 16-QAM mobile data system using TTIB-based fading correction techniques

Abstract

The transmission of high speed data to and from a mobile terminal is far from simple. This paper presents practical results for one solution to the problem, namely referencebased channel sounding. A 9600bps 16-QAM data system is employed together with the Transparent Tone-In-Band (TTIB) reference processing technique.Excellent performance under both static and fading conditions is observed.

Error-Bound Formulation for Multichannel Reception of<tex>$M$</tex>-DPSK and Pilot-Aided<tex>$M$</tex>-PSK Over Rayleigh-Fading Channels With Postdetection Combining

“…Many types of INF have been considered in the past, such as simple Gaussian filters to more advanced Wiener filters [20], [22], [23]. In this analysis, an ideal INF is assumed, i.e., the INF is an ideal lowpass filter with frequency characteristic of if if (13) where denotes the bandwidth of the INF and . To avoid distortion due to the filtering, the value of must be equal to or greater than the Doppler spread (fading bandwidth) of the channel.…”

On Modeling of a Mobile Multipath Fading Channel

“…It degrades the bit error rate (BER), and frequently introduces an irreducible BER, or error floor. The use of a pilot tone to mitigate the effects of fading has been explored by several authors [30] - [33]. The tone provides the receiver with an explicit amplitude and phase reference for detection, and thereby suppresses the error floor.…”

Vehicular speed response PLL using square‐law circuits

“…However, when a pilot signal is used in PSK in a fading environment, a method that simply combines the pilot signal and the data signal has difficulty completely removing the interference because of Doppler spread. On the other hand, methods that lessen the interference are Transparent ToneIn-Band (TTIB) [7] that places the pilot signal in the space provided by moving the data signal spectrum and a method that sends the data and pilot signals by using time division. In these cases, the optimum power allocation ratio of the data signal and the pilot signal is believed to depend on the signal-to-noise ratio, the maximum Doppler frequency, and the antenna directivity.…”