Download PDF by American Radio Relay League: Antenna Compendium Volume 3

By American Radio Relay League

ISBN-10: 0872594017

ISBN-13: 9780872594012

Quench your thirst for brand new antenna designs, from Allen's Log Periodic Loop Array to Zavrel's Triband Triangle. find a 12-meter quad, a discone, modeling with MININEC and VHF/UHF ray tracing.

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Extra resources for Antenna Compendium Volume 3

Example text

ARFCN 1 is completely designated as a packet switched service radio, as all the physical channels are providing GPRS services each burst lasting for 546 microseconds, with an added guard period giving a total of 577 microseconds for each radio burst. The eight time slots or physical channels in a radio channel may be allocated as traffic channels (TCH), or some of the physical channels may be used as control channels. The purpose of the control channels is to inform the mobile stations using the cell of the cell operating parameters (BCCH and SCH) and to allow the mobile station to access the network services (CCCHs).

GPRS logical channels which are used in the absence of a PBCCH Logical channel Abbreviations used in this book BCCH (DL) B CCCH (DL and UL) CCCH AGCH (DL) AGCH Functional description The broadcast control channel, one of the many logical channels on the eponymous BCCH carrier. The broadcast control channel carries system information telling the mobile station of the cell operating parameters. It also tells the mobile station if the cell offers GPRS services and, in the absence of a PBCCH, carries the GPRS operating parameters.

The basic frame is a part of the RLC/MAC block in GPRS as four frames make up an RLC/MAC block. As there are eight physical channels in each frame, then four frames may accommodate eight RLC/MAC blocks. 46 ms to send an RLC/MAC block. 05 kb/s, then each RLC/MAC block must carry 168 information bits. We shall examine the validity of this statement in a later chapter. 2 The GPRS 52-frame multiframe and logical channel structures The GPRS logical channel structure is different in type from circuit switched logical channel structures in that the logical channels share physical channels dynamically as required.

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Antenna Compendium Volume 3 by American Radio Relay League

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