R&S CMU200 and CMUgo (E)GPRS Measurements
■This application note is not intended to explain the associated theory in full but rather simply provides a brief summary of the most important aspects.
■The 'General Packet Data Service' (GPRS) and the 'Enhanced GPRS' (EGPRS) provide packet-oriented services for data communication in existing networks (e.g. Internet) in compliance with the GSM standard. GPRS offers increased data rates by bundling several timeslots (as with 'High Speed Circuit Switched Data' (HSCSD)), and EGPRS provides a further increase in data rate by means of 'Enhanced Data Rates for GSM Evolution' (EDGE; new modulation: 8PSK).
■(E)GPRS is simply an extension of GSM and uses physical resources of GSM (phase 2+ or 2.5).
■Packet-oriented data communication means that resources are only used if data is actually to be transmitted. In (E)GPRS, this is referred to as Temporary Block FloW (TBF>.
■To allow better adaptation to the given channel characteristics, four channel codes (CS1 to CS4; CS1 provides optimum protection and the lowest data rate) have been defined in GPRS and nine modulation and channel-coding schemes (MCS1 to MCS9) defined in EGPRS (Figure 1). Here it is important to note that MCS1 to MCS4 are also GMSK-modulated in EGPRS.
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CMU200 、 CMU-B21 、 CMU-B21v14 、 Option B41 、 CMU-K20 、 CMU-K21 、 CMU-K22 、 CMU-K23 、 CMU-K24 、 CMU-K42 、 CMU-K43 |
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Application note & Design Guide |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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2020/05/24 |
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1CM52 |
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2.7 MB |
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