Rf and if digitization in Radio Receivers: Theory, Concepts, and Examples
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Chương-3, tham-số-hiệu-năng, OFDM vs OFDMA
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1. PUBLICATION NO. 96-328 2. Government Accession No.
3. Recipient’s Accession No. 4. TITLE AND SUBTITLE
Mar. 1996, Reissued. Feb. 2014 6. Performing Organization Code NTIA/ITS 7. AUTHOR(S)
9. Project/Task/Work Unit No. 6 90 6105 8. PERFORMING ORGANIZATION NAME AND ADDRESS Institute for Telecommunication Sciences National Telecommunications & Information Administration U.S. Department of Commerce 325 Broadway Boulder, CO 80305 10. Contract/Grant Number.
11. Sponsoring Organization Name and Address National Telecommunications & Information Administration Herbert C. Hoover Building 14 th & Constitution Ave., NW Washington, DC 20230 12. Type of Report and Period Covered
14. SUPPLEMENTARY NOTES 15. ABSTRACT (A 200-word or less factual summary of most significant information. If document includes a significant bibliography or literature survey, mention it here.)
Hardware development of analog-to-digital converters (ADCs) and digital signal processors, including specialized integrated circuits, has advanced rapidly within the last few years. These advances have paved the way for development of radio receivers using digitization at the IF and in some cases at the RF. Applications for these receivers are expected to increase rapidly in areas such as cellular mobile, satellite, and personal communications services (PCS) systems. The constraints placed on these receivers due to hardware limitations of these devices are investigated in this paper. Some examples of state- of-the-art ADCs, signal processors, and specialized integrated circuits are listed. Various quantization techniques, nonlinear compression devices, postdigitization algorithms for improving dynamic range, sampling downconverters, and specialized integrated circuits are discussed as they are expected to be useful in the development of these types of receivers. Several examples of radio receivers employing digitization at the IF and RF are also presented. 16. Key Words (Alphabetical order, separated by semicolons) analog-to-digital converters; automatic gain control devices; digital signal processors; digitization; logarithmic amplifiers; quantization; radio receivers; sampling downconverters; signal-to-noise ratio; spurious free dynamic range
17. AVAILABILITY STATEMENT
UNLIMITED.
FOR OFFICIAL DISTRIBUTION. 18. Security Class. (This report)
Unclassified 20. Number of pages
60 19. Security Class. (This page)
Unclassified 21. Price:
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