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What are the MBSFN reference signals for the LTE downlink reference signal and the upstream reference signal?

What are the LTE downlink reference signals and upstream reference signals?In R9, the downlink defines four reference signals, respectively, for the cell-specific reference signal (C-RS), the user-specific reference signal (UE-RS, also known as Dm-rs), MBSFN reference signal, position reference

LTE downlink Physical layer transport mechanism (1)-Antenna port antenna port and cell specific reference signal CRS

In the Last Post, "LTE Physical Transmission Resources (3)-time-frequency resources," the final mention of Pcfich and other downstream physical channels, this blog post originally wanted to write Pcfich channel, but in preparation for writing Pcfich, found the need to use the antenna port related content, and these content is not yet written. So this paper first write the antenna port and downlink reference signal

Android phone signal strength detection details _android

the use of the voltage ratio of both calculation, to use 20log (methyl voltage /b voltage). [Example] a power than the second power of one-fold, then 10LG (a power/b power) =10lg2=3db, that is, a power than B power of 3 DB. Conversely, if the power of a is half of the power of B, then the power of a is smaller than the power of B 3 DB. Summary: DBM is a negative number, the closer to 0 the higher the signal str

Signal strength display and signal refresh time in Android

The UI Signal display on the android interface is implemented by sending AT commands to the communication module through RIL. For example, at + CSQ, we can obtain real-time RIL information through logcat-B radio. So how long does the signal display refresh on the interface? Frameworks/base/telephony/Java/COM/Android/Internal/telephony/servicestatetracker. Java /** Sign

Android system transplantation and debugging -------) how to modify the number of 4G signal strength grids displayed on Android phones

Android system transplantation and debugging -------) how to modify the number of 4G signal strength grids displayed on Android phones Before modifying the displayed signal strength, let's take a look at what is dB and what is dBm? 1. dBDB is a value that represents relative values. A pure ratio represents only the rel

360 Router P1 signal bad how to do? tutorial on adjusting the signal strength of the 360 router P1

360 Routing Area P1 has a feature that adjusts the signal strength 1, first, the computer and the router to connect (wired wireless Can) 2, open the browser, in the browser address input 192.168.0.1, enter 3, enter the router's password, enter the route of the management system 4, click on the function expansion, click Signal

Android Signal Strength calculation method

How GSM is calculated:A: This is GSM, whether the LTE should be different.ASU conversion to dbm:dbm=-113+ (2*asu)All* Get the GSM Signal strength, valid values is (0-31) as defined in TS* 27.007 8.5if (ASU else if (ASU >=) level = Signal_strength_great (4);else if (ASU >= 8) level = Signal_strength_good (3);else if (ASU >= 5) level = Signal_strength_moderate (2);

Wireless signal strength test software Wirelessmon

In wireless coverage engineering, it is often necessary to test the wireless signal strength of the field to determine if the wireless signal is in place and whether the wireless signal strength meets the requirements. Wireless WiFi and sound, the

Full resolution of mobile phone signal strength

power size value. In dB and DBM computing, pay attention to the basic concepts, When one DBM is used to subtract another dBm, the result is dB, for example, 30dbm-0dbm = 30db. 3. Cell phone signal strength Representation Okay, soMobile phoneThe unit of the number shown on is dBm. When you look at it carefully, you will find that the value is negative. That is to say, the phone will display-67 (DBM),

Ecsq command parameter description for network signal strength parameters of android system, androidecsq

Ecsq command parameter description for network signal strength parameters of android system, androidecsq Ecsq command parameter description:// For LTE (MT6592) // AT + ECSQ: // GSM: + ECSQ: // UMTS: + ECSQ: // LTE: + ECSQ:

Android phones get signal strength information

Android phones get signal strength informationThis document describes how to use the Android system to get mobile phone signal strength and other information Android phones get signal strength information

How to increase the signal strength of a wireless router

With the development of wireless networks in China, many families have begun to use wireless routers, but it is a headache for users with weak signals. I will give you an analysis here. Wireless signal strength is a concern of the majority of users, who want their own Wireless Router network signal to cover every corner of the room, especially where wireless Inte

Tplink cloud router wireless signal strength adjustment tutorial

Application background Different area of the environment, the router signal emission intensity requirements are different. Under the condition that the signal quality is guaranteed, the larger the area (obstacle) is, the higher the signal strength is required. In a small environment, the

Android gets Wi-Fi signal strength

Reprinted: http://www.cxybl.com/html/android/20120428/23302.html Android gets Wi-Fi signal strength Android gets the Wi-Fi signal quality: int strength = wifimanager. calculatesignallevel (info. getarg (), 5); that is, the signal streng

[Android] 13, Andoran tooth positioning (a)--how to periodically get Bluetooth node signal strength?

ObjectiveThis article will use a simple example of how to use the Bluetooth function of the Android phone to periodically search the signal strength of the peripheral Bluetooth node, for interested in playing Bluetooth indoor positioning enthusiasts to provide a little ideas. ( If you want to use the Android phone and Bluetooth module communication to achieve remote control function, you can refer to: http:

Briefly describe how to improve wireless signal strength (1)

Wireless signal strength is a concern of the majority of users. Everyone wants their wireless network signal to cover every corner of the room, especially where wireless Internet access is needed, otherwise, it cannot be truly wireless. However, many of my friends are very frustrated after buying a wireless router. Most of them are abandoning wireless application

TP Router wr890n How to adjust the wireless signal strength

TP Router wr890n Adjust the wireless signal strength first step, enter the Settings page Login Router Management interface, click Application Management, access to the Application Center, the following figure Find the signal to adjust, click to enter, as follows TP Router wr890n Adjust the wireless

CC1101 is used to monitor the carrier signal strength (CCA) in the air.

Label: cc1101Before reading this article, read the data manual carefully and read the two articles I have reproduced, CCA (1) and CCA (2), for literacy.I have been using the CC1101 wireless chip recently. I have successfully debugged the CCA function today. I 'd like to share it with you. My idea is to enable the CC1101 to be the CCA function. The GDO2 pin is configured as the output carrier sensing level and the sensing level threshold is set. Currently, the carrier

"Android" gets the signal strength of the currently connected WiFi

1. Get the currently connected WiFi informationWifimanager Wifi_service = (wifimanager) getsystemservice (Wifi_service);Wifiinfo wifiinfo = Wifi_service.getconnectioninfo ();Where Wifiinfo has the following methods:Wifiinfo.getbssid ();Wifiinfo.getssid ();Wifiinfo.getipaddress (); Gets the IP address.Wifiinfo.getmacaddress (); Gets the MAC address.Wifiinfo.getnetworkid (); Gets the network ID.Wifiinfo.getlinkspeed (); Gets the connection speed, which allows the user to learn about this informati

Android to get the current connected WiFi signal strength method _android

This article illustrates how Android gets the strength of the currently connected WiFi signal, and is a very common and important skill in Android development. Share for everyone to use for reference. The specific methods are as follows: 1. Get WiFi information that is currently connected Wifimanager Wifi_service = (wifimanager) getsystemservice (wifi_service); Wifiinfo wifiinfo = Wifi_service.get

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