Dynamic data sending method for in-band on-channel (IBOC) system based on ear perception

Abstract

The invention discloses a dynamic data sending method for an in-band on-channel (IBOC) system based on ear perception. A digital signal is arranged at different spectrum positions based on an international telecommunications union-radiocommunication (ITU-R) base station (BS).1387-1 psychological acoustics model; and received analog audio quality is analyzed to obtain an ear evaluation level of an audio program under different spectrum positions of the digital signal, so that a relation between each digital signal spectrum position of each frame of signal and a nuclear magnetic resonance (NMR) evaluation level. When the digital signal is sent, the spectrum position of the digital signal corresponding to a specific level is selected, so that a sub carrier number for transmitting the digital signal is instructed; and the digital signal of the dynamically distributed sub carrier number is coupled with an analog signal. On the premise that each frame of data has uniform ear perception, the available spectrum of the digital signal is increased, and the digital signal transmission capacity under a hybrid mode is improved.

Description

technical field [0001] The invention relates to a wireless communication system, in particular to a data sending method of an in-band co-frequency system. Background technique [0002] In the mixed mode of HD-Radio broadcasting, a fixed combination method is used to perform In-Band On-Channel (IBOC) transmission of analog and digital signal spectrums. However, since the spectral bandwidth of the FM analog signal varies with the program signal, the bandwidth varies widely. With a high probability of time, the bandwidth of the analog FM signal is much smaller than the boundary bandwidth of the analog and digital signal spectrum specified in the mixed mode. In this case, the real-time variation of the bandwidth of the analog signal results in a large amount of vacant spectrum. At the same time, since the spectral bandwidth occupied by the analog signal changes in real time, while the digital signal spectrum is fixed at the same spectral position, the audio quality heard by th...

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Problems solved by technology

[0010] However, since the spectral bandwidth of the FM analog signal varies with the program signal (such as frequency, amplitude), under a large time probability, the bandwidth of the analog FM signal is much smaller than the boundary bandwidth of the analog and digital signal spectrum specified in the standard

In this case, the real-time variation of the bandwidth of the analog signal not only results in a large amount of empty spectrum, but also results in a large variation in the audio quality heard by the human ear over time

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