dgps antenna

). Troubleshooting: When mixing IEEE 802.11b and IEEE 802.11g wireless devices, be sure to set the wireless AP into a mixed (MIXED) mode, which can be compatible with both IEEE 802.11b and 802.11g two modes. Wireless network connection is not 2: The wireless client is not receiving a signal failure phenomenon: After building a wireless LAN, the client is found not to receive the wireless AP signal. The wireless network has no signal. Failure Analysis: There are several possible causes fo

opportunity to enter the normal standby state, the current in the 5-20ma about a regular change (about a second swing), this time the mobile phone to answerThe receiving part is basically normal;②: If the phone boot after the current is always in the 50-100ma around irregular changes, in about 10 seconds back to 10-20ma, and then a few seconds to jump to 50-100ma around, so repeated, thenIndicates that the receiving part is not working properly.③ if the current in the boot after a motionless (n

with 300Mbps transmission speed. NW335 150M Wireless USB card NW335 is a cost-effective 150Mbps removable antenna USB card, it is widely used in the environment than ordinary USB card wider, product performance is better, is the formation of wireless LAN and extended wireless signal coverage of the excellent terminal equipment. NW352 150M 11N Wireless PCI network card (for desktop exclusive) NW352 is a high specification, strong performance of th

suspected that pilot contamination may exist, the first possibility is that there is not enough protection in pilot planning, and the other may be that the time tolerance of pilot channel of some base stations has a large deviation. For the latter, a transmitter tester can be used to test the potential base station. (Computer science) The user complained to the warning and network management reports that there is a problem with the call, and has ruled out base station and base station day feed

. Mmmm 4 South/Northern Hemisphere indication N N = North; S = South 5 Longitude 12100.1536 Dddmm. Mmmm 6 Eastern/Western Hemisphere instructions E E = east; W = West 7 Positioning instructions 1 0 = undetermined 1 = positioning SPS Mode 2 = positioning DGPS, SPS Mode 8 Satellite Number 10 00-12

detection based on GPRS, Forest Engineering, 2006 (2 ).[2] Bi hazardous. Vehicle Management System Based on GPRS and DGPS, Journal of Beijing Jiao Tong University, 2006 (2 ).[2] Motorola. g20_at_commands, 2005-04-06.[4] ubrov. Application for timlh GPS module, 2005-03.[5] Zhang Qin, Li jiaquan. principles and applications of GPS measurement. Beijing: Science Press, 2005-07.[6] Xu Aijun. IAR ewarm embedded system programming and practices. Beijing: Be

1. Standard nmea0183 statements1. Global Positioning System Fix Data (GGA) GPS Positioning Information$ Gpgga, 2. gps dop and active satellites (GSA) current satellite information$ Gpgsa, 3. GPS satellites in view (GSV) Visible satellite information$ Gpgsv, Note: 4. recommended minimum specific GPS/transit data (RMC) recommended positioning information$ Uplmc, 5. Track made good and ground speed (Vtg) ground speed information$ Gpvtg, 6. Geographic Position (GlL) Location Geographic Information$

velocity information (pgrmv) 3D speed information$ Pgrmv, 6,DGPS beacon information (pgrmb) Beacon difference Information$ Pgrmb, Iii. Text format description: Region Description: Length: Note:------------------------------------------------------The START character of the period 1 is always '@'------------------------------------------------------/The last two digits of the Year in 2 UTC| ------------------------------------------------------| 2 UT

1. Standard NMEA0183 statements1. Global Positioning System Fix Data (GGA) GPS Positioning Information$ GPGGA, 2. gps dop and Active Satellites (GSA) current satellite information$ GPGSA, 3. GPS Satellites in View (GSV) Visible satellite information$ GPGSV, Note: 4. Recommended Minimum Specific GPS/TRANSIT Data (RMC) Recommended positioning information$ Uplmc, 5. Track Made Good and Ground Speed (VTG) Ground Speed information$ GPVTG, 6. Geographic Position (GLL) Location Geographic Information$

The extensive use of wireless networks also brings about the security of wireless networks. Because wireless networks are different from wired network physical node access controllability, the security of wireless networks deserves our attention. For the current wireless network, we can improve the security of the wireless network through the following settings. 1. Disable unauthorized access The key to ensuring the security of wireless access points is to prohibit unauthorized users from access

own hardware. The wireless transmission rate is mostly 54 M, and the maximum is no more than 150 M. it is meaningless to have a high Router speed. Look at the brand. Be sure to select a big-brand product, because the chip that really determines the performance of the wireless router is its. The chips used by major brands are of high quality and stable performance. Some brands use low-end chips to reduce costs. Although some parameters are high, the performance is unstable. Look at the

One of the most prominent advantages of the Siemens SX1 mobile phone is that it supports stereo MP3 and built-in FM. Although the original stereo PTT headset is of good quality, it can also be used as an antenna with built-in FM, however, one of the traditional methods of using a Siemens mobile phone is to use a headset adapter to enable the use of standard 5mm stereo headphones, such as senhaiser mx300/400/500. Therefore, the modification of the SX1

, it can be widely used for interconnection between different buildings. In addition, according to different protocols, wireless bridges can be divided into 802.11b or 802.11 in the GHz band and 802.11a wireless bridges in the GHz band. In the absence of high obstacle peaks or buildings), a pair of fast networking and temporary networking for field operations. The distance depends on the environment and the antenna, and now 7km point-to-point microwa

Wireless LAN has become one of the most commonly used network technologies. However, if we are faced with a weak network signal, how can we solve it. Here is a detailed introduction. Q: I am now using a wireless LAN, but I feel that the data transmission speed is very slow. Is there any solution? A: It is estimated that the signal status is poor. You can try to add an external antenna or adjust the wireless channel to improve the communication speed.

With the development of technology, the number of technical problems also increases. For wireless networks, improving or improving the security of networks also brings inevitable problems. Here we will introduce them in detail. The extensive use of wireless networks also brings about the security of wireless networks. Because wireless networks are different from wired network physical node access controllability, the security of wireless networks deserves our attention. For the current wireless

priority. This is why such technology has been vigorously promoted internationally in recent years. However, the New Fixed Wireless Access Network must be FWA with a wide bandwidth to meet the needs of the user's development of data communication trends. As a matter of fact, the wireless cellular network of mobile communication has evolved from the current second generation to the coming third generation, and even to the far-reaching fourth generation. It also attaches great importance to the c

For solutions with weak Wireless LAN signal, the problem of Wireless LAN signal is very hot. As the name suggests, there are many ways to solve the problem of Wireless LAN signal, that is, the virtual network channel of the wireless router. This article also introduces several popular wireless routers on the market. Q: I am now using a wireless LAN, but I feel that the data transmission speed is very slow. Is there any solution? A: It is estimated that the signal status is poor. You can try to a

will not be perfect. After all, those obstacles will directly affect the normal transmission of data signals in the wireless LAN. 2. When the distance between the remote network and the local LAN is relatively long, we can appropriately reduce the size of the network transmission bandwidth to achieve the purpose of long-distance data transmission. If we really need to implement long-distance wireless transmission, we may try to set up a wireless LAN relay station in the middle so as to bypass t

overlapping frequencies, and can even theoretically overlap to an infinite number. However, to increase the sensitivity of demodulation, LTE currently supports half of the overlapping wavelength of OFDM. MIMO In fact, one of the important reasons why LTE abandoned CDMA in the Early Days was that CDMA had poor support for MIMO, while the sub-carrier data used by OFDM was converting serial data into parallel data, parallel data can be well adapted to MIMO reception. (For the reason why CDMA is no

Wireless Networks are no stranger. Laptops and smartphones can all access wireless networks. This is what we often do in our lives, however, many people may encounter various usage errors when using wireless networks. I. The main factors affecting the wireless network are transmit power, accept sensitivity, and antenna gain. Currently, the main trend of wireless networks is in signal coverage and transmission rate, generally, the method to enhance the