Precoded modulo-precanceling systems for simulcasting analog FM and digital data

被引:0
作者
Papadopoulos, Haralabos C. [1 ]
Sundberg, Carl-Erik W. [1 ,2 ]
机构
[1] DoCoMo USA Labs, Palo Alto, CA 94304 USA
[2] SundComm, Sunnyvale, CA 94085 USA
关键词
digital audio broadcasting; digital modulation; dirty paper coding; spread response precoding; simultaneous analog FM and data; HD radio; hybrid IBOC;
D O I
10.1109/TCOMM.2008.040269
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
We present techniques for simulcasting low-power digital data and analog FM over fading channels. Our methods have strong connections to what are referred to as dirty paper coding techniques in that a low-power digital data signal is modulo-added to the host analog FM signal. Due to the low power levels of the digital data and the suppression capability of analog FM, a standard analog FM receiver can be used to reliably recover the analog audio signal. We develop digital receivers that work reliably over fading channels given imperfect channel state information. Spread-response precoding is exploited to not only provide rate-1 temporal diversity benefits, but also to simplify the design of the modulo-precanceler and the receiver. Our theoretical and simulation-based performance analysis of the digital receivers and our MSE-based analog FM distortion analysis suggest that precoded modulo-precanceling schemes provide substantially higher data rates than existing precanceling strategies at the cost of transmission delay and transmitter and receiver complexity. The systems we present are also readily compatible with conventional channel coding techniques as well as with analog FM postcancelers, which can improve the digital receiver bit-error-rate performance at the expense of receiver complexity.
引用
收藏
页码:1279 / 1288
页数:10
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