Trade-Off Between Data Rate and Signal Power Split in GNSS Signal Design


An important modification of the signal structure in most of the upcoming World Navigation Satellite Systems (GNSS) is the supply of a pilot channel in quadrature with the information channel, permitting users to profit from improved signal processing. When designing GNSS signals, an important issue that affects the overall system performance could be a trade-off between navigation knowledge bit rate and knowledge channel signal power. This study of future GNSS signals therefore performs the necessary detailed analysis of the optimal relationship between knowledge rate and signal power split in terms of the offered carrier-to-noise ratio. The strategy focuses on the optimization of the information/pilot combining algorithms (e.g., pilot-solely tracking, knowledge-only tracking, or combined tracking), the bit rate, and therefore the signal power split between knowledge and pilot channels.

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