Bit Error Rate Packet Error Rate
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be challenged and removed. (March 2013) (Learn how and when to remove this template message) In digital transmission, the number of bit errors is the number of received bits of a data stream over a communication channel that have been altered due to noise, interference, distortion or bit packet error rate calculation synchronization errors. The bit error rate (BER) is the number of bit errors per unit time.
Acceptable Bit Error Rate
The bit error ratio (also BER) is the number of bit errors divided by the total number of transferred bits during a studied time interval. bit error rate measurement BER is a unitless performance measure, often expressed as a percentage.[1] The bit error probability pe is the expectation value of the bit error ratio. The bit error ratio can be considered as an approximate estimate of the bit error
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probability. This estimate is accurate for a long time interval and a high number of bit errors. Contents 1 Example 2 Packet error ratio 3 Factors affecting the BER 4 Analysis of the BER 5 Mathematical draft 6 Bit error rate test 6.1 Common types of BERT stress patterns 7 Bit error rate tester 8 See also 9 References 10 External links Example[edit] As an example, assume this transmitted bit sequence: 0 1 1 0 0 0 1 0 1 bit error rate tester 1 and the following received bit sequence: 0 0 1 0 1 0 1 0 0 1, The number of bit errors (the underlined bits) is, in this case, 3. The BER is 3 incorrect bits divided by 10 transferred bits, resulting in a BER of 0.3 or 30%. Packet error ratio[edit] The packet error ratio (PER) is the number of incorrectly received data packets divided by the total number of received packets. A packet is declared incorrect if at least one bit is erroneous. The expectation value of the PER is denoted packet error probability pp, which for a data packet length of N bits can be expressed as p p = 1 − ( 1 − p e ) N {\displaystyle p_{p}=1-(1-p_{e})^{N}} , assuming that the bit errors are independent of each other. For small bit error probabilities, this is approximately p p ≈ p e N . {\displaystyle p_{p}\approx p_{e}N.} Similar measurements can be carried out for the transmission of frames, blocks, or symbols. Factors affecting the BER[edit] In a communication system, the receiver side BER may be affected by transmission channel noise, interference, distortion, bit synchronization problems, attenuation, wireless multipath fading, etc. The BER may be improved by choosing a strong signal strength (unless this causes cross-talk and more bit errors), by choosing a slow and robust modulation scheme or line coding scheme, and by applying channel coding schemes such as redundant forward error correction c
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turn on suggestions Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. Showing results for Search instead for Do you mean Silicon Labs Community : Silicon Labs http://community.silabs.com/t5/Proprietary-Knowledge-Base/Bit-Error-Rate-BER-vs-Packet-Error-Rate-PER/ta-p/112863 Community Knowledge Base : Wireless Knowledge Base : Proprietary Knowledge Base : Bit Error Rate (BER) vs. Packet Error Rate (PER) Go To Silicon Labs Community Forum Welcome and Announcements Silicon Labs Knowledge Base Microcontrollers 8-bit MCU 32-bit MCU Wireless Bluetooth / Wi-Fi Mesh Proprietary Other Products Category Optical/RH/Temp Sensor Timing Interface Other Products Hardware and Software error rate Tools Simplicity Studio and Software Discussions General Discussions and Suggestions Chinese Forum ChineseForum Share Projects Contests Tools Software Libraries Development Kits Reference Designs Third Party Tools Training Video-Tutorials Lectures White Papers Blog Official Blog of Silicon Labs Chinese Blog Article Options Article History Subscribe to RSS Feed Mark as New Mark as Read Bookmark Subscribe Email to a bit error rate Friend Printer Friendly Page Report Inappropriate Content Bit Error Rate (BER) vs. Packet Error Rate (PER) by Silicon_Labs on 02-06-2012 12:36 PM - edited on 08-20-2014 06:30 AM by Nari Labels: Wireless Question Should the Si443x chips be characterized using Bit Error Rate (BER) or Packet Error Rate (PER) measurements? Answer Both BER and PER measurements are useful, but they convey different information.A BER measurement is easier to perform. This measurement may be performed with the RFIC placed in continuous RX mode, using only a conventional lab signal generator as the signal source. The lab signal generator is typically modulated with a continuously-looped PN sequence (e.g. PN9). The RFIC is configured to output the RXDATA and RXCLK signals in real-time on GPIO pins, which are fed back to the BER Test box for comparison with the transmitted PN sequence and subsequent calculation of error rate. As the RFIC is placed into continuous RX mode for this measurement, the configuration of the RFIC may be done by executing a si
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