Many people know about 3G antenna and WIFI antenna, but do you understand the difference between the two products? Today, we will give a detailed introduction to the differences between the two。

        What are the differences between 3G antenna and WIFI antenna

        1. 2G wireless monitoring transmission mode mainly includes CDMA and GSM. These two modes have low hardware cost, large coverage, and slow transmission speed. The theoretical transmission rate is 153.6Kbps at most, which is only 60~80Kbps in actual use. Because the video image requires at least 512Kbps for smooth transmission, this speed is far from meeting the video requirements. Therefore, few manufacturers choose to use in wireless monitoring projects. Another biggest disadvantage is that the traffic fees charged by operators are too high, which will generate a large amount of fees every month and every year. Generally, it will only be considered when there is a certain amount of money and the WIFI wireless equipment is not available in remote areas.

        2. 3G wireless monitoring is a 3G technology access mode adopted by mobile (TD-SCDMA), telecom (CDMA2000 EVDO), and China Unicom (WCDMA) operators. Since 2009, many monitoring manufacturers have developed relevant products in this regard through vigorous promotion by operators. The outstanding advantage of 3G is the high-speed download capability. The ideal value can reach the transmission rate of 3Kbps~20Mbps. However, it is still in the promotion stage, so the transmission rate needs further research.

        3G currently has such defects as limited wireless bandwidth capacity, limited access users, and time extension. In the case of multi-user sharing, it is difficult to ensure the speed and delay requirements of wireless video monitoring. The main disadvantage is that the traffic fees charged by operators are too high, which is unacceptable to general customers.

        Strictly speaking, WIFI type wireless monitoring can be divided into two modes: one is analog wireless monitoring; The other is digital wireless monitoring.

        1. Analog wireless monitoring is to directly modulate the video signal on the 2.4G or 1G wireless channel, transmit it through the antenna, the monitoring center receives the wireless signal through the antenna, and then demodulates the original video signal through the wireless receiver. This monitoring method has no compression loss and almost no delay, so it can ensure the video quality, but it is only suitable for point-to-point short distance (within 1KM) one-way transmission, not suitable for large-scale deployment.

        In addition, because there is no modulation and calibration process, interference immunity is poor and frequency points are few, so in the case of complex wireless signal environment, it will produce a lot of interference, resulting in image confusion, loss, etc. Therefore, it is not recommended to use this method when there are multiple images to be transmitted.

        2. Digital wireless monitoring is to encode and compress video signals, modulate them through digital wireless channels (2.3G/2.4G/5.8G, etc.), and then transmit them through antennas. On the contrary, the receiving end receives the signal from the antenna, then performs wireless de spreading and video decompression, finally reverts to analog video signal for transmission, which is also widely used in the domestic market. Digital microwave has large scalability, and the communication capacity can be used for at least dozens of channels. It is relatively easy to construct, has high communication efficiency, and is flexible to use.

        Digital wireless has incomparable advantages over analog wireless, such as large area (5-30 square kilometers), multiple monitoring points (5-500 points), multiple situations requiring relay, complex situations, and multiple interference sources. When LP5800-WBSWIFI base station is used as the center and CPE equipment at the front of the base station is used, the transmission performance price ratio is very high. Digital wireless has large capacity, strong anti-interference ability, good confidentiality, longer transmission distance of the same transmission power, less impact by terrain or obstacles, rich interfaces, strong expansion ability, etc.

        Of course, different wireless transmission technologies have their own applications. For example, in factories, oilfields, border defense, forests, etc., there are many wireless monitoring systems using WIFI. With the improvement of 3G's performance in all aspects, the decline of traffic costs, the maturity of the network environment, and the general demand for wireless monitoring in a wide range, 3G will also be further used.

        The cost performance ratio of transmission is very high with the WIFI base station as the center and the CPE equipment at the front of the base station. Digital wireless has large capacity, strong anti-interference ability, good confidentiality, longer transmission distance of the same transmission power, less impact by terrain or obstacles, rich interfaces, strong expansion ability, etc.