Digital receiving apparatus

H - Electricity – 04 – B

Patent

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Details

H04B 1/16 (2006.01) H04B 1/69 (2006.01) H04B 1/707 (2006.01) H04B 7/005 (2006.01)

Patent

CA 2245341

De-spread sections 35A, 35B, and 35C de-spread received multipath signals 30 based on time data 34A, 34B, and 34C, and output de-spreading signals 36A, 36B, and 36C to a weighting circuit 37, respectively. The weighting circuit 37 performs a threshold determination using an absolute value of the de-spreading signals 36A, 36B, and 36C. When each of the de-spreading signals is below a certain threshold value, a weighting factor is set to 0. When each of the de-spreading signals is more than the threshold value, a complex conjugate of phase data of the de-spreading signals 36A, 36B, and 36C is used as a weighting factor. The de-spreading signals 36A, 36B, and 36C are multiplied by the corresponding weighting factor, respectively.

Des sections de désétalement 35A, 35B et 35C effectuent un désétalement de signaux reçus via de multiples trajets 30 en utilisant des données temporelles 34A, 34B et 34C et transmettent des signaux sans étalement 36A, 36B et 36C à un circuit de pondération 37. Ce circuit de pondération 37 effectue une détermination de seuil en utilisant la valeur absolue des signaux sans étalement 36A, 36B et 36C. Quand chacun de ces signaux se trouve sous un certain seuil, le facteur de pondération est mis à 0. Quand chacun des signaux se trouve au-dessus du seuil, le conjugué complexe des données de phase des signaux sans étalement 36A, 36B et 36C est utilisé comme facteur de pondération. Les signaux sans étalement 36A, 36B et 36C sont respectivement multipliés par le facteur de pondération correspondant.

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