單項(xiàng)選擇題CDMA語(yǔ)音業(yè)務(wù)信道編碼一般采用()

A.TURBO編碼
B.香農(nóng)編碼
C.卷積編碼
D.SBC子帶編碼


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1.單項(xiàng)選擇題CDMA語(yǔ)音信令流程正確的是()

A.originationmessage→BSACK→TCHpreamble→Channelassignmentmessage→BSACK→MSACK→ServiceConnectmessage→Serviceconnectcompletion→assignmentcomplete
B.originationmessage→BSACK→ServiceConnectmessage→TCHpreamble→BSACK→MSACK→Channelassignmentmessage→Serviceconnectcompletion→assignmentcomplete
C.originationmessage→BSACK→Channelassignmentmessage→TCHpreamble→BSACK→MSACK→ServiceConnectmessage→Serviceconnectcompletion→assignmentcomplete
D.OriginationMessage→CMServiceRequest→TchPreamble→Establish→AssignmentComplete→Allocation;

2.單項(xiàng)選擇題CDMA用戶跨過(guò)BSC邊界并完成切換,這個(gè)切換是()

A.軟切換
B.硬切換
C.不一定

3.單項(xiàng)選擇題CDMA移動(dòng)臺(tái)的噪聲系數(shù)一般為()dB,

A.3~5
B.6~8
C.8~10
D.10~12

4.單項(xiàng)選擇題CDMA信道處理過(guò)程中,原始的信息單元是()

A.比特
B.符號(hào)
C.碼片
D.信元