ofdm modem

than the Minn algorithm, which improves the accuracy and certainty of timing. However, in the case of large noise disturbance, the algorithm still has a large timing synchronization estimation error, and the stability of the synchronization estimation is still poor.Reference documentsPark B,choen H, KO E, et al. A novel timing estimation method for OFDM Systems[j]. IEEE commun.leet.2003,7 (5): 53-55.\[m (d) =\frac{\left | P (d) \right |} {r^{2} (d)}^

estimation will be affected greatly under the condition of low Snr.Reference documentsMinn H, Zeng M,bhargava V k.on timing offser estimation for OFDM Systems[j]. IEEE commun.lett.2000,4 (7): 242-244.\[m (d) =\frac{\left | P (d) \right |} {r^{2} (d)}^{2}\]\[p (d) =\SUM_{K=0}^{1}\SUM_{M=0}^{N/4 -1}r^{*} (D+m+\frac{nk}{2}) R (d+m+\frac{n}{4} + \frac{nk}{2}) \]\[r (d) =\sum_{k=0}^{1}\sum_{m=0}^{n/4-1}\left | R (d+m+\frac{n}{4} + \frac{nk}{2}) \right |^{

serial port and the PC communication, the communication line connected to the charger.Hart Conversion switch: 250Ω, none, 24v/250ω three Hart conversion modesdial to "250Ω" is the internal 250Ω resistor working state;dial to "None" is not built-in 24V and 250ω resistance of the working State;dial to "24v/250ω" is the built-in 24V and 250Ω resistors working state.According to the actual situation, the conversion switch is dialed to the corresponding location, and then connected to the line.① bui

Objective:These days began to get ready to engage in OFDM and the like, do not move the first MATLAB simulation, here I will slowly update, is basically my own learning sentiment bar First, PRBSPRBS is the abbreviation for Pseudo random binary Sequence, meaning "pseudo-random binary sequence". The PRBS code has a "random" feature, is because in the PRBS stream, the binary number "0" and "1" is random, but it and the real meaning of the random code, th

SMS cats are devices used to send and receive text messages. They are the same as mobile phones.Insert the SIM card and connect it to the computer through the (USB or serial port) data cable/PCI slotYou can use related software on your computer to send and receive text messages. Related software is the text message application that sends and receives text messages.You can develop your own device, or ask the device manufacturer of SMS to provide The principle and fee of sending and receiving te

Note: These are common Modem commands. Some commands may not apply to all modem instances. If any problem occurs, see the modem documentation or contact the modem manufacturer's Technical Support Department. All commands (with two exceptions) must start with the character. The two exceptional commands are escape sequ

The other party cannot hear me. Symptom: Why can't I hear the voice of the other party when I dial the modem? I used the phone dialing program under WIN 98 and tried at command to dial up directly. Modem calls are not allowed. Method: special software is required. Step: omitted. Note: The Voice function of modem can be achieved only through corresponding softwar

Modem dial-up Internet in Linux In the broadband access has not come into the tens of thousands of households, we have to connect to the Internet, or to drive the "cat", so for many netizens, modem is a very lovely thing. Windows provides a good support for modem, making it easy to install modems. But it's not so good to install this lovely thing under Linux.Firs

The most important thing for us to use a computer is to access the Internet. We need to complete basic installation settings. The most important part is the installation and setup of the modem. Generally, the Modem can be divided into the following four categories based on the Modem format and installation method:1. ExternalThe external

My ADSL "CAT" was under attack. For this reason, I asked the kitten to cultivate "internal strength" and "security. The following describes how to cultivate secrets ". Recently, my ADSL Modem often experienced problems. Sometimes I can work normally when I start the system, but most of the time I cannot connect to the web page. After a while, I restarted the ADSL Modem again. At first, I thought it was a pr

In the preceding section, we introduced the two most common ways to configure ADSL and their respective purposes, now we will take the Web method as an example to describe the many configuration options that may be encountered when configuring the ADSL modem.Detailed Web configurationIn the web configuration interface, the following describes the detailed content in the order of each tag. In most options, the detailed explanation and description are provided.The system management configuration s

Why do I need modem call display?Because modem, whether it is a built-in modem or an external modem, as long as it supports incoming call display and is connected to a computer, you can install the relevant incoming call display software to make calls, the phone number is displayed on the computer. However,

V. Modem Glossary 　　 At command (atcommands): a modem command language invented by Hayes, which is now a de facto standard and used by all modem manufacturers. The name of each command starts with the letter ". At is followed by letters and numbers to indicate specific functions. For example, "atdt" is a dialing command, other Commands include "initialize the

When using modem to surf the Internet, we are likely to encounter the modem does not perform dial-up operation trouble. In the correct connection to the computer, modem and telephone lines, dial-up Internet operation, if the modem does not dial tone, always did not connect or LED does not flicker, indicating that the

Currently, ADSL virtual dialing is widely used for broadband access, which naturally requires the support of dial-up devices-ADSL Modem. Installing and using ADSL Modem is simple, but what should I do if I encounter such equipment faults? This article lists three problems and solutions that have been repeatedly mentioned by netizens in the ADSL Modem, hoping to h

This article describes in detail how to set up the ADSL Router. What should we do? The following article will give us a detailed introduction. At the end of the year ago, I joined my neighbors and installed ADSL in partnership. My computer was used as the Internet host and connected to the telephone line through a dedicated ADSL Modem, in this way, virtual dial-up is used to achieve the most affordable and simple way to access the Internet, while near

Overview: analyzes and solves some problems when accessing the internet at home.I. Wireless routers A wireless router is used for accessing the Internet and providing wireless coverage. A wireless router can be used as a forwarder to forward the broadband network signal received from the home wall to nearby wireless network devices (laptops, WiFi-enabled mobile phones, etc.) through an antenna ). Popular wireless routers in the market generally support four access methods: XDSL/cable, dynamic XD

Internet access in China has developed very rapidly. It may not matter if many people do not know about cable modem in Internet access. After reading this article, you must have gained a lot, I hope this article will teach you more things. When cable modem uses a cable TV network for high-speed access, the general connection mode is: one end is connected to a computer, and the other end is connected to a cl

1, why the ADSL modem in the link lamp has been flashing state? Answer: ADSL modem in the flashing state of the link lights, indicating that the line signal is not stable, if after a period of time to return to normal, it shows that the flashing state of the link lamp is part of the telecommunications parts of the adjustment caused by the local line. If the link lights have been flashing state and can not

As the cost of Internet access is decreasing, more and more users begin to use the ADSL Method for Internet access. Although installing ADSL is a simple task, you may encounter a variety of inexplicable problems during use. In order to make it easier for you to use ADSL to access the Internet, the content below will answer some common questions to help you solve problems easily.1. Why is the Link light in ADSL Modem always flashing? A: The Link light