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frequency-hopping

基于跳頻的音頻連接系統設計（Mono Audio Link Using Frequency Hopping）及源代碼

基于跳頻的音頻連接系統設計（Mono Audio Link Using Frequency Hopping）及源代碼，代碼是用IAR PIC16 C語言編寫的，該語言與ANSI C兼容

標簽： Frequency Hopping Audio Using

上傳時間： 2015-10-09

上傳用戶：270189020
用matlab編寫的用于跳頻技術的基于simulink環境的仿真程序-using Matlab prepared for the frequency-hopping technology based

用matlab編寫的用于跳頻技術的基于simulink環境的仿真程序-using Matlab prepared for the frequency-hopping technology based on Simulink environment simulation program

標簽： frequency-hopping technology simulink prepared

上傳時間： 2016-08-10

上傳用戶：LIKE
Adaptive Frequency Hopping

Adaptive Frequency Hopping

標簽： Frequency Adaptive Hopping

上傳時間： 2017-03-25

上傳用戶：1427796291
快速跳頻通信系統同步技術研究

同步技術是跳頻通信系統的關鍵技術之一，尤其是在快速跳頻通信系統中，常規跳頻通信通過同步字頭攜帶相關碼的方法來實現同步，但對于快跳頻來說，由于是一跳或者多跳傳輸一個調制符號，難以攜帶相關碼。對此引入雙跳頻圖案方法，提出了一種適用于快速跳頻通信系統的同步方案。采用短碼攜帶同步信息，克服了快速跳頻難以攜帶相關碼的困難。分析了同步性能，仿真結果表明該方案同步時間短、虛警概率低、捕獲概率高，同步性能可靠。 Abstract: Synchronization is one of the key techniques to frequency-hopping communication system， especially in the fast frequency hopping communication system. In conventional frequency hopping communication systems， synchronization can be achieved by synchronization-head which can be used to carry the synchronization information， but for the fast frequency hopping， Because modulation symbol is transmitted by per hop or multi-hop， it is difficult to carry the correlation code. For the limitation of fast frequency hopping in carrying correlation code， a fast frequency-hopping synchronization scheme with two hopping patterns is proposed. The synchronization information is carried by short code， which overcomes the difficulty of correlation code transmission in fast frequency-hopping. The performance of the scheme is analyzed， and simulation results show that the scheme has the advantages of shorter synchronization time， lower probability of false alarm， higher probability of capture and more reliable of synchronization.

標簽： 快速跳頻同步技術通信系統

上傳時間： 2013-11-23

上傳用戶：mpquest
CDMA 的仿真程序

CDMA 的仿真程序，Frequency Hopping Spread Spectrum,Random frequency hopps to form a spread signal

標簽： CDMA 仿真程序

上傳時間： 2013-12-22

上傳用戶：nanshan
SPREAD SPECTRUM MODULATION TECHNIQUES -spread spectrum - those modulation methods that are producin

SPREAD SPECTRUM MODULATION TECHNIQUES -spread spectrum - those modulation methods that are producing a signal whose spectrum is more wider than of the data signal, the occupied frequency band being independent by the signal of data band. -The signals with spread spectrum of direct sequence type BPSK (BPSK-DS-SS) -The signals with spread spectrum of direct sequence type QPSK – DS–SS - Frequency hopping spread spectrum signals (FH-SS)

標簽： MODULATION TECHNIQUES modulation SPECTRUM

上傳時間： 2017-06-05

上傳用戶：lht618
基于有藍牙共存情況下的WiFi射頻模塊設計

移動通信網絡由于帶寬和技術的限制，遠遠不能滿足人們不斷高漲的無線上網需求。Wi-Fi作為無線接入技術MLAN的主流標準口益成熟，它能夠隨時隨地高速連接到Internet，極大地滿足了用戶對無線上網需求，受到消費者的青睞。因而越來越多的移動終端都集成了Wi-Fi功能，Wi-Fi和藍牙樣成為移動終端的標配。隨之而來的是wi-Fi和藍牙都工作在2.4CHZz ISM頻段而引發的互相擾問題，導致數據吞吐量下降，語音質量惡化失真，極端狀況下甚至導致鏈路斷開而不能正常工作。因此，必須尋求有效的措施和方法，實現兩種技術在近距離的和諧共存，這已成為非常迫切的技術需要，也成為人們研究的一個熱點和難點。近距離WiFi和藍牙互相1擾的問題，目前已經形成了非常多的有效解決機制，包括基于Wi-Fi的PTA（Packet Traffic Arbitration）、AWMA（Alternating Wireless Medium Access）和DSE（Deterministic Spectral Excision），其中PTA和AWMA機制在Wi-Fi側MAC層實現，通過協調Wi-Fi和藍牙的幀發射時間來避免相互干擾：而DSE是在Wi-Fi側物理層PHY實現，通過一個可編程帶阻濾波器（Notch Filter）來阻止來白藍牙的窄帶干擾。還有基于藍牙側的AFH（Adaptive Frequency Hopping），它通過跳頻，自動避開被干擾的頻點，從而大大提高了藍牙傳輸性能。

標簽： 藍牙共存 wifi 射頻模塊

上傳時間： 2022-06-20

上傳用戶：zhanglei193
test RF module for 800MHZ frequency

test RF module for 800MHZ frequency

標簽： frequency module test 800

上傳時間： 2014-10-13

上傳用戶：上善若水
Frequency Scale Conversion From f To f Scale frq2mel mel2frq mel The mel scale is based on the hu

Frequency Scale Conversion From f To f Scale frq2mel mel2frq mel The mel scale is based on the human perception of sinewave pitch. frq2erb erb2frq erb The erb scale is based on the equivalent rectangular bandwidths of the human ear. frq2midi midi2frq midi The midi standard specifies a numbering of semitones with middle C being 60. They can use the normal equal tempered scale or else the pythagorean scale of just intonation. They will in addition output note names in a character format.

標簽： Scale Conversion Frequency mel

上傳時間： 2015-06-07

上傳用戶：
Based on 80C196MC One-chip Computer Frequency Conversion Rapid System of Accent Design Program Listi

Based on 80C196MC One-chip Computer Frequency Conversion Rapid System of Accent Design Program Listing

標簽： Conversion Frequency Computer One-chip

上傳時間： 2015-06-11

上傳用戶：我們的船長

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frequency-hopping

基于跳頻的音頻連接系統設計（Mono Audio Link Using Frequency Hopping）及源代碼

用matlab編寫的用于跳頻技術的基于simulink環境的仿真程序-using Matlab prepared for the frequency-hopping technology based

Adaptive Frequency Hopping

快速跳頻通信系統同步技術研究

CDMA 的仿真程序

SPREAD SPECTRUM MODULATION TECHNIQUES -spread spectrum - those modulation methods that are producin

基于有藍牙共存情況下的WiFi射頻模塊設計

test RF module for 800MHZ frequency

Frequency Scale Conversion From f To f Scale frq2mel mel2frq mel The mel scale is based on the hu

Based on 80C196MC One-chip Computer Frequency Conversion Rapid System of Accent Design Program Listi