基于跳頻的音頻連接系統(tǒng)設(shè)計(jì)（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(biāo)簽： Frequency Hopping Audio Using
上傳時(shí)間： 2015-10-09
上傳用戶：270189020
用matlab編寫的用于跳頻技術(shù)的基于simulink環(huán)境的仿真程序-using Matlab prepared for the frequency-hopping technology based on Simulink environment simulation program
標(biāo)簽： frequency-hopping technology simulink prepared
上傳時(shí)間： 2016-08-10
上傳用戶：LIKE
Adaptive Frequency Hopping
標(biāo)簽： Frequency Adaptive Hopping
上傳時(shí)間： 2017-03-25
上傳用戶：1427796291
同步技術(shù)是跳頻通信系統(tǒng)的關(guān)鍵技術(shù)之一，尤其是在快速跳頻通信系統(tǒng)中，常規(guī)跳頻通信通過同步字頭攜帶相關(guān)碼的方法來實(shí)現(xiàn)同步，但對于快跳頻來說，由于是一跳或者多跳傳輸一個(gè)調(diào)制符號，難以攜帶相關(guān)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(tǒng)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(guān)碼的困難。分析了同步性能，仿真結(jié)果表明該方案同步時(shí)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(biāo)簽： 快速跳頻 同步技術(shù) 通信系統(tǒng)
上傳時(shí)間： 2013-11-23
上傳用戶：mpquest
CDMA 的仿真程序，F(xiàn)requency Hopping Spread Spectrum,Random frequency hopps to form a spread signal
上傳時(shí)間： 2013-12-22
上傳用戶：nanshan
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(biāo)簽： MODULATION TECHNIQUES modulation SPECTRUM
上傳時(shí)間： 2017-06-05
上傳用戶：lht618
移動(dòng)通信網(wǎng)絡(luò)由于帶寬和技術(shù)的限制，遠(yuǎn)遠(yuǎn)不能滿足人們不斷高漲的無線上網(wǎng)需求。Wi-Fi作為無線接入技術(shù)MLAN的主流標(biāo)準(zhǔn)口益成熟，它能夠隨時(shí)隨地高速連接到Internet，極大地滿足了用戶對無線上網(wǎng)需求，受到消費(fèi)者的青睞。因而越來越多的移動(dòng)終端都集成了Wi-Fi功能，Wi-Fi和藍(lán)牙樣成為移動(dòng)終端的標(biāo)配。隨之而來的是wi-Fi和藍(lán)牙都工作在2.4CHZz ISM頻段而引發(fā)的互相 擾問題，導(dǎo)致數(shù)據(jù)吞吐量下降，語音質(zhì)量惡化失真，極端狀況下甚至導(dǎo)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(shí)現(xiàn)兩種技術(shù)在近距離的和諧共存，這已成為非常迫切的技術(shù)需要，也成為人們研究的一個(gè)熱點(diǎn)和難點(diǎn)。近距離WiFi和藍(lán)牙互相1擾的問題，目前已經(jīng)形成了非常多的有效解決機(jī)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(jī)制在Wi-Fi側(cè)MAC層實(shí)現(xiàn)，通過協(xié)調(diào)Wi-Fi和藍(lán)牙的幀發(fā)射時(shí)間來避免相互干擾：而DSE是在Wi-Fi側(cè)物理層PHY實(shí)現(xiàn)，通過一個(gè)可編程帶阻濾波器（Notch Filter）來阻止來白藍(lán)牙的窄帶干擾。還有基于藍(lán)牙側(cè)的AFH（Adaptive Frequency Hopping），它通過跳頻，自動(dòng)避開被干擾的頻點(diǎn)，從而大大提高了藍(lán)牙傳輸性能。
上傳時(shí)間： 2022-06-20
上傳用戶：zhanglei193
test RF module for 800MHZ frequency
標(biāo)簽： frequency module test 800
上傳時(shí)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 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(biāo)簽： Scale Conversion Frequency mel
上傳時(shí)間： 2015-06-07
上傳用戶：
Based on 80C196MC One-chip Computer Frequency Conversion Rapid System of Accent Design Program Listing
標(biāo)簽： Conversion Frequency Computer One-chip
上傳時(shí)間： 2015-06-11
上傳用戶：我們的船長
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