Abstract
Advances in wireless communications have enabled various technologies for wireless digital communication. In the field of digital radio broadcasting, several specifications have been proposed, such as Eureka-147 and digital radio mondiale (DRM). These systems require a new spectrum assignment, which incurs heavy cost due to the depletion of the available spectrum. Therefore, the in-band on-channel (IBOC) system has been developed to work in the same band with the conventional analog radio and to provide digital broadcasting services. This paper discusses the function and algorithm of the high definition (HD) radio frequency modulation (FM) digital radio broadcasting system. Content includes data format allocation, constellation mapping, orthogonal frequency division multiplexing (OFDM) modulation of the transmitter, timing synchronization, OFDM demodulation, integer and fraction carrier frequency (integer carrier frequency offset (ICFO) and fractional CFO (FCFO)) estimation, and channel estimation of the receiver. When we implement this system to the field programmable gate array (FPGA) based on a hardware platform, both theoretical and practical aspects have been considered to accommodate the available hardware resources.
Highlights
With advances in wireless communication, many schemes have been developed and are currently available
In the digital radio broadcasting area, several specifications are currently in use, for example, the Eureka-147 in Europe [1]. This is known as digital audio broadcasting (DAB) [2,3,4] and has been adopted by many European countries; one of its early commercial adopters was the British Broadcasting Corporation (BBC), which went into digital broadcasting in 1995
This system utilizes the orthogonal frequency division multiplexing (OFDM) technology. Another digital radio broadcasting proposition is called digital radio mondiale (DRM), which was developed in France and is able to operate at frequencies below 30 MHz [3, 5]
Summary
With advances in wireless communication, many schemes have been developed and are currently available. In the digital radio broadcasting area, several specifications are currently in use, for example, the Eureka-147 in Europe [1] This is known as digital audio broadcasting (DAB) [2,3,4] and has been adopted by many European countries; one of its early commercial adopters was the British Broadcasting Corporation (BBC), which went into digital broadcasting in 1995. Another digital radio broadcasting proposition is called digital radio mondiale (DRM), which was developed in France and is able to operate at frequencies below 30 MHz [3, 5] Both of these digital radio broadcasting technologies require a new spectrum assignment for their proprietary use, which is costly due to limited spectrum availability.
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