Cell phone jammer interferes the transilient signals generated by cell phones

At the same time the radar, military police equipment caused interference. Reflected in the system of indicators is not the case the user uplink signal received power RTWP total uplift, RTWP indicators we observed interference has become an effective tool. Interference analysis usually consider the following aspects: frequency interference with adjacent cell scrambling code associated strong cross-slot interference UP slot with the system frequency interference with other wireless communication system similar to the interference generated, such as PHS, W, GSM and even microwave and so on. Producers design circuits in all parts of cell phone jammer according to the frequency range of GSM. Other radio-wave transmitter used for military equipment produced by interference, such as radar, jammers and so on. All of the above interference will result in the TD system, network performance is seriously affected. 1 TD-SCDMA interference investigation and analysis were generally start with the internal interference devices, check from the internal network. Exclude net disturbance, and then the external interference investigation. 1.2 Initial interference interference in general there are several characteristics of the surface phenomenon, usually they are simultaneously: the better the signal region (PCCPCH_RSCP>-90dBm), phone call through rate is very low.People design circuits in all parts of cell phone jammer according to the power control of GSM. Found that the number of valid signatures under no-load surge, phone call from an unsuccessful; PCCPCH RSCP good, but the C / I is poor. Cell coverage decreases, the antenna away from the vicinity of the call also keep her in, UE transmit power significantly increased until the maximum 24dbm. Occasionally connected, sound quality poor, the basic hear, and easily dropped calls. Point DSP reported by LMT RTWP or RRU's testRTWP command query, you can find multiple frequency multiple slot ISCP value is high (greater than-100dbm). Spectrum analyzer / TD Scanner can be seen on the interference signal. An adjacent area measurement is very low, can not switch, but the manual switch to manually re-election or after, the actual value of a strong signal. 1.3 interference interference outside the system needs to solve a wide range of resources to solve the problem.cell phone jammer cut off the data communication between cell phones and the base station. For the system of co-channel interference, frequency planning should be doing as much as possible so that the optimal frequency allocation, plus station at a later stage should pay special attention to frequency planning, to avoid serious interference with the frequency. As a TD in the same system using code division multiple access within a time slot, so use the scrambling code to distinguish users within the same time slot, so the scrambling code assigned to consider the relevance of scrambling. Bring on the uplink for the downlink interference, the main solution is to use Upshifting technology. Interference of the main solutions are as follows: find the optimal frequency external interference sources to avoid interference between different systems scrambling code planning (a good choice orthogonality completely different) 2 Chapter 1 Overview of cross-slot priority UpPCH adjustment slot to adjust the offset RF parameters and other methods to solve the following on-system interference and outside interference are described, as well as some classic cases of interference analysis. cell phone jammer interferes the transilient signals generated by cell phones.
3 Chapter 2 Chapter interference within the system to troubleshoot interference problems are often passed the road test, users complained that, for the road test, because we do not pay attention to the quality of calls, calls from the general performance of the low success rate, higher transmit power and the terminal.