參數(shù)資料
型號(hào)： LV2700V
廠商： Sanyo Electric Co.,Ltd.
英文描述： Spread Spectrum Communications IC(頻譜擴(kuò)展通訊芯片)
中文描述： 擴(kuò)頻通信集成電路（頻譜擴(kuò)展通訊芯片）
文件頁(yè)數(shù)： 8/20頁(yè)
文件大?。?/td> 343K
代理商： LV2700V
Description of Operation and Application Information
1. Principle of Operation
The LV2700V has all the transmission and reception functions necessary for carrying out half-duplex communication
using spread spectrum communication. The spectrum spreading is being done using the direct sequence (DS) method
in which the carrier wave is multiplied by the PN code. The PN code used for spectrum spreading at this time is the
typical M sequence code, and it is possible to select six types of code lengths from 15 chips to 511 chips. Further,
since the clock for generating the PN code is derived from the carrier wave by frequency division, a system is
realized in which the carrier wave and the PN code are synchronized in phase thereby obtaining a configuration with
simplified PN synchronization system.
2. Transmission Mode
The transmission block is shown in Fig. 1.
Fig. 1 The transmission block
PN Code generation method
The PN (Pseudo-random Noise) code is, as its name suggests, a pulse train in which the occurrence probabilities of 1’s
and 0’s are pseudo-random in nature, and is required for spectrum spreading in the direct spreading method. Although
there are many types of PN code series, the most typical among them, the M sequence PN code (maximum-length
sequence ) is being used in the LV2700V. The generator of the M sequence PN code is configured using a shift
register and feedback circuit. Fig. 2 shows the configuration of a PN code generator of the 15-chip type. In the
LV2700V, it is possible to select among six types of PN codes from 15 chips to 511 chips. Although there are several
shift register feedback methods (called feedback taps) in the case of M sequence of code length more than 15 chips, in
the LV2700V, only one type of feedback tap is used for each code length. The actual positions of the feedback taps are
shown in Table 1.
Fig. 2 PN Code generator
No. 5651-8/20
LV2700V
Data input
DS Output
PN Code
相關(guān)PDF資料
PDF描述
LV3100M Parametric Equalizer
LV320MH 32 Megabit (4 M x 8-Bit) MirrorBit⑩ 3.0 Volt-only Uniform Sector Flash Memory with VersatileI/O⑩ Control
LV3400M FM Multiplex Filter(FM多路濾波器)
LV3400 FM Multiplex Filter
LV3403M 3V Operation Filter for FM Multiplex Broadcasting Reception(用于FM多路廣播接收的3V運(yùn)算濾波器)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LV-271M2G---3035S 制造商:Surge Components Inc 功能描述:CAP ALUM 270UF 400V ?20% 2000LHRS 30 X 35 - Bulk
LV-271M2W---2550S 制造商:Surge Components Inc 功能描述:CAP ALUM 270UF 450V ?20% 2000LHRS 25 X 50 - Bulk
LV-271M2W---3040S 制造商:Surge Components Inc 功能描述:CAP ALUM 270UF 450V ?20% 2000LHRS 30 X 40 - Bulk
LV-271M2W---3535S 制造商:Surge Components Inc 功能描述:CAP ALUM 270UF 450V ?20% 2000LHRS 35 X 35 - Bulk
LV275DI-Q4 制造商:Okaya Electric America Inc 功能描述:
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*