The RF and Microwave Handbook by Mike Golio

By Mike Golio

Недавнее смещение акцента с оборонной и правительственной работы на деятельность коммерческой беспроводной связи привело к резкому изменению работы типичного инженера СВЧ. Современный радио и СВЧ инженер должен знать ожидания клиентов, рыночные тенденции, технологии производства и заводские модели до такой степени, что является беспрецедентным в истории радио и СВЧ техники. С широким, сбалансированным спектром материалов, этот справочник дает вам возможность понять и использовать эти факторы, чтобы улучшить вашу общую производительность. При участии a hundred видных ученых и специалистов-практиков, эта выдающаяся работа наполнена необходимой информацией по теории, методам и применению СВЧ. В ней содержится обзор микроволновых и радиочастотных продуктов, включая как существующие, так и новые коммерческие беспроводные продукты, такие как сотовые телефоны и беспроводные локальные сети, а также традиционное военное применение, такое как радары и системы радиоэлектронной борьбы.

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2 kb/s. S. specs. 0 kb/s. 2. S. (CONUS). Cellular radio or public land mobile telephone systems offer a full range of services to the traveler similar to those provided by PSTN. 3. Vehicle Information System and Intelligent Highway Vehicle System are synonyms for the variety of systems and services aimed toward traffic safety and location. This includes: traffic management, vehicle identification, digitized map information and navigation, radio navigation, speed sensing and adaptive cruise control, collision warning and prevention, etc.

8 Conv. 0 Conv. 9/17 9/17 Note: Multiple Access: F = Frequency Division Multiple Access (FDMA), F/T = Hybrid Frequency/Time DMA, F/C = Hybrid Frequency/Code DMA. 5 for PDC. B/OQ corresponds to the BPSK outbound and OQPSK modulation scheme inbound. comp. or kb/s stands for syllabic compandor or speech rate in kb/s; kHz and/or kb/s stands for peak deviation in kHz and/or channel rate kb/s. IS–634 standard interface supports AMPS, NAMPS, TDMA and CDMA capabilities. IS–651 standard interface supports A GSM capabilities and A+ CDMA capabilities.

This is in spite of the fact that most wireless links have a raw bit error rate (BER) on the order of 1 in 1000. Clearly, we would like to see an error rate of 1 in 1012 or better. How is this astounding improvement achieved? The following two-level approach has proved successful. The first level employs FEC to correct a large percentage of the errors. This code is used in tandem with a powerful error-detecting algorithm to find the rare errors that the FEC cannot find and correct. This combined FEC/ARQ approach limits the amount of feedback to an acceptable level while still achieving the necessary reliability.

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