Operating Manual Vol 1 - ES Documentation

SMIQDigital Standard PHS2.11 Digital Standard PHSWith the options Modulation Coder (SMIQB20) and Data Generator (SMIQB11) provided, modulationsignals according to the Japanese PHS standard 1 can be generated. PHS is a TDMA standard forprivate and public cordless phones.SMIQ can generate both the transmit signal of a cell station (CS) and the transmit signal of a personalstation (PS). Transmission from CS to PS is called "downlink", "uplink" being used for transmission inthe opposite direction.Uplink and downlink are transmitted in the separate time slots of a frame using the time duplex method.Each frame consists of 8 slots. The data contents of each slot can be defined individually by SMIQ bymeans of a slot editor. SMIQ can generate a control physical slot and also a communication physicalslot. Each slot can be switched on or off. A defined intermediate level can also be set.A burst type has to be defined to configure a slot. The following burst types can be selected:• TCHFULL simulation of a communication channel for a speech coder rate of 32 kbit/s,• TCHHALF simulation of a communication channel for a speech coder rate of 16 kbit/s,• VOX simulation of a communication channel in non-speech intervals with uplinktransmission only in every fourth frame,• SYNC, simulation of a sync channel and• ALL_DATA burst type for test purposes with freely programmable data contents in the selectedslot.The following internal modulation sources are available:• different PRBS generators with a sequence length between 2 9 -1 and 2 23 -1 and• data lists, ie freely programmable data sequences from the data generator memory.For generating the PHS signals, SMIQ inserts the modulation data continuously (in real time) into theselected slots. Using a digital signal processor the data generator generates a data sequence withmodulation data and control signals for envelope control.The data generator in SMIQ generates a data stream which is converted into IQ signals in themodulation coder. According to the PHS standard, the modulation type is π/4 DQPSK at a symbol rate of192 ksymbol/s and √COS filtering. Symbol rate and filtering can be changed in SMIQ.1 Personal Handy Phone System ARIB Standard (RCR STD-28)1125.5555.03 2.115E-9