Many people know 3G ante購懂nnas and WIFI antennas, 如讀but do you know the differen冷慢ce between these two 從可products? Today, Shenxun 我月Communication Antenna Edit到件or will give a detailed intr外學oduction to the difference betwee書樹n the two.

What are the differences bet業路ween 3G antenna and WIFI antenna?

1. The 2G wireless monitorin靜火g transmission mode main空新ly includes CDMA and GSM two modes. 數一The hardware cost of these t跳對wo modes is low, the coverage i輛時s large, and the transmission畫要 speed is slow. The theor作相etical value transmission rat月呢e is up to 153.6Kbps, whic計綠h basically only reaches 60~們說80Kbps in actual use. Because the video話東 image requires 512Kbps to transmi銀朋t smoothly, this speed i什計s far from the video 我爸requirements. Therefore, few manufa微一cturers choose to use in wir老用eless monitoring projects. Another bigg地小est disadvantage is that t店嗎he traffic fee charged by the op場輛erator is too high, and 但從every month, every year, a large人費 amount of fees will be incurred. Ge朋樂nerally, it will only be considered whe對器n it is very remote, WIFI wireless equ下樹ipment cannot do it, and ther現光e is a certain amount of畫房 funds.

2. 3G wireless monitoring adopts the 3員錢G technology access method o舊影f mobile (TD-SCDMA), telecommunic短睡ations (CDMA2000 EVDO)學道, and China Unicom (能國WCDMA) operators. Since 2009對信, various operators have vigorously pr飛綠omoted, and there have been m國家any monitoring Manufa匠電cturers develop related products in 金購this regard. The outstanding我河 advantage of 3G is the high-speed do做多wnload capability. The i不信deal value can reach a transmissio高好n rate of 3Kbps~20Mbps, but it is黑玩 still in the promot相店ion stage, so further research is 歌船needed in terms of t公作ransmission rate.

3G currently has shortcoming數還s such as limited wireless 報問bandwidth capacity, limited access u些路sers, and time extension. In the 從厭case of multi-user sha能船ring, it is difficult to低做 guarantee the rate and 子服delay requirements of wireless video鐘日 surveillance. The m女做ain disadvantage is th東讀at the traffic fee charged 能很by the operator is to亮拿o high. Not acceptable to gen離小eral customers.

Strictly speaking, WIFI wireless monito亮又ring is divided into 書弟two methods: one is a山購nalog wireless monitoring; the 著中other is digital wireless moni爸愛toring.

1. Analog wireless monitor是書ing is to directly modulate th我家e video signal on the 2.4G話跳 or 1G wireless channel and t請長ransmit it through the antenna. The mo錢關nitoring center receives t風公he wireless signal t務話hrough the antenna, and then demodulate長學s the original video signal空師 through the wireless rec哥視eiver. This kind of monitoring The met河雜hod has no compression loss and almost校有 no delay, so the video 家鄉quality can be guaranteed,物森 but it is only suitable for point-道票to-point short-distance (within 1KM) si男書ngle-channel transmission, not suit海物able for large-scale deployment.

In addition, because there is no modula國窗tion and calibration proce通信ss, the anti-interfere靜算nce ability is poor,錯城 and the frequency points are 機吧few, so in the case of the wireless sig務件nal environment is co音理mplex, it will produce a lot of in坐他terference, causing imag行很e confusion, loss, etc. The影資refore, when there are multip制銀le images to be transmi歌說tted, this method is電房 not recommended.

2. Digital wireless monitoring麗暗 is to encode and compr腦放ess the video signal first,海作 modulate it through the digit友一al wireless channel (2.3G/2.4G/5.友小8G, etc.), and then use 還科the antenna to transmi有朋t it. The receiving end is the opp門聽osite. The signal is received 低放by the antenna, followed by但件 wireless despreading and video decompr師短ession, and finally 冷做restored to an analog video signal分房 for transmission. This met費北hod is also more commonly u來村sed in the domestic market.事自 Digital microwave is highly scalable, 理麗with at least dozens of cha國湖nnels available for communicatio費紙n capacity, relatively easy to con街空struct, high in comm吧動unication efficiency, and 綠和flexible in use.

Digital wireless has the incompar妹小able advantages of analog wir唱高eless, such as large area (5-30 sq體內uare kilometers), many mon村師itoring points (5-500 p們分oints). There are many situa樹又tions where relays are needed, 快銀the situation is complicated購廠 and there are many 厭現interference sources. Use L房音P5800-WBSWIFI The ba這信se station is the cen機南ter and cooperates with the base st遠看ation front-end CPE equipment t著區o transmit the cost pe年音rformance is very high. Di能遠gital wireless has larg麗秒e capacity, strong anti-草一interference ability, a為還nd good confidentiality.朋哥 The same transmission power ha他能s a longer transmission di他店stance, is less affecte音多d by terrain or obstacles,間我 has rich interfaces, and has暗林 strong expansion capabilities.

Of course, different wire算多less transmission technologies ha技議ve their own applicable 為空places. For example, in factories, 雨制oil fields, border defenses, forests,請很 etc., there are more wireless近兒 monitoring using WI喝廠FI. With the improvement of various厭微 aspects of 3G perform是為ance, the decline of traffic costs, t到外he maturity of the network environm兵了ent, and the general demand f吧朋or large-scale wireless moni還用toring will also promote Fur有鄉ther use of 3G.

The WIFI base station is the c光厭enter and the CPE equipm如老ent at the front end of來姐 the base station is very cost-effectiv分和e. Digital wireless has large煙麗 capacity, strong anti-interfe樹弟rence ability, and good co師術nfidentiality. The s議女ame transmission power has 票通a longer transmission道花 distance, is less affected by 舊好terrain or obstacles近拿, has rich interfaces, and has strong e又懂xpansion capabilities.