發明
中華民國
098137750
I 397280
發射器、接收器、多等級多媒體廣播/群播服務系統以及其調變方法
國立清華大學
2013/05/21
一種多等級多媒體廣播/群播服務系統包含一發射器以及至少一接收器。發射器以N個主要通道傳送N個不同解析度之主要訊號,以及以一輔助通道傳送一輔助訊號,輔助訊號之解析度與最高解析度之主要訊號相同,且此輔助訊號與最高解析度之主要訊號於相對應之調變星座圖之位置具有可耦合性。接收器可以透過耦合一主要訊號與相對應解析度之輔助訊號/虛擬輔助訊號以得到較低解析度之虛擬輔助訊號,其與相同解析度之主要訊號於相對應之該調變星座圖之位置亦具有可耦合性。每一種解析度之接收器即可分集性結合主要訊號及輔助訊號/虛擬輔助訊號以改善接收訊號的品質。 A multi-class multimedia broadcast/multicast service (MBMS) system includes a transmitter and at least one receiver. The transmitter transmits N primary signals by N primary channels and an auxiliary signal by an auxiliary channel, wherein the resolution of the auxiliary signal is identical to the primary signal with highest resolution and the locations of the auxiliary signal and the primary signal with highest resolution on the corresponding signal constellations can be coupled. The receiver couples the primary signal with the corresponding auxiliary signal/virtual auxiliary signal to obtain a lower resolution virtual auxiliary signal, which can also be coupled with the primary signal of the same resolution. Therefore, receiving quality of each resolution is improved by combining the primary signal and the corresponding auxiliary signal/virtual auxiliary signal.
智財技轉組
03-5715131-62219
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