Packet Error Rate Versus Bit Error Rate
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Bit Error Rate Vs Snr
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C.S0033 Tests Performed Using PER How is a PER Measurement Made? Packet Error Rate (PER) is used to test the performance of an access terminal's receiver. PER is the ratio, in percent, of the number of FTAP or FETAP Test Packets bit error rate matlab not successfully received by the access terminal (AT) to the number of FTAP or FETAP
Acceptable Bit Error Rate
Test Packets sent to the AT by the test set. See Forward Test Application Protocol (FTAP) , Multi-carrier Test Application Protocol and
Error Rate Definition
Forward Enhanced Test Application Protocol (FETAP) . To perform a packet error rate measurement, the test set sends an FTAP (when current physical layer subtype is subtype 0) or FETAP Test Packet (when current physical layer subtype https://www.nordicsemi.com/eng/Nordic-FAQ/Silicon-Products/nRF24L01/How-to-measure-Bit-Packet-Error-Rate-BER-PER-on-the-nRF24L01 is subtype 2) or FMCTAP Test Packet (when current physical layer subtype is subtype 3) to the access terminal. See Release A Physical Layer Subtype or Release B Physical Layer Subtype to configure the physical layer subtype. Each packet contains 16 FCS (Frame Check Sequence) bit, which provide information about the packet. If the AT is able to decode the packet and the FCS checks (the information relayed by the FCS matches the packet http://rfmw.em.keysight.com/rfcomms/refdocs/1xevdo/1xevdo_meas_cperror_desc.html characteristics), then the packet is successfully received. The AT sends one or more FTAP/FETAP/FMCTAP Loop Back Packets to the test set to indicate how many FTAP/FETAP/FMCTAP Test Packets were successfully received for each 16-slot "observation interval" (frame). The AT sends one Loop Back Packet (or more, if needed to convey all of the records) containing a record for each FTAP/FETAP/FMCTAP Test Packet in the observation interval. The Loop Back Packets are queued for transmission on the Reverse Traffic Channel, and the AT must provide buffering for at least 8 FTAP/FETAP/FMCTAP Loop Back Packets. An FTAP/FETAP/FMCTAP Loop Back Packet is generated even if no FTAP/FETAP/FMCTAP Test Packets were received during the 16-slot observation interval. In performing the PER measurement, the test set: always operates with 100% packet activity (see Fixed Settings ). 100% packet activity means that all slots contain Forward Traffic Channel or Control Channel packets (data). The test set fills any empty slots with filler data directed to a random AT other than the AT under test. (0% packet activity means that the source is pulsed off when there is no data to transmit in the slot, and then pulsed on to transmit the MAC and Pilot Channels. This is not supported by the test set.) always implements forced single encapsulation. Forced single encapsulation means that there is always
how do i transfrom "Bit Error Rate" to "frame Error Rate"? Messages sorted by: [ date ] [ thread ] [ subject ] http://mailman.isi.edu/pipermail/ns-users/2006-October/057413.html [ author ] If you plug the values in the formula PER=1-(1-0.001)^8000 = 0.9996658 The above result implies that 99.96% of you packets will have errors and if there are no additional error correction mechanisms, they will be dropped/lost. A BER of 10^-3 is too high and is not practical. For example, in most wireless scenarios, the BER is assumed to be 10^-6. By error rate the way, why are you posting this in ns-users list? Abdul. ªL®õ¨¶ wrote: > for example : > when I give ber=10^-3, packet size=1000bytes, what is PER? > > -----Original Message----- > From: Abdul Jabbar [mailto:jabbar at gmail.com] > Sent: Monday, October 02, 2006 6:24 PM > To: ªL®õ¨¶ > Cc: ns-users at isi.edu > Subject: Re: [ns] how do i transfrom "Bit Error Rate" bit error rate to "Packet Error > Rate"? > > As far as I know, the relationship between BER and PER , assuming that > bit errors are independent and uniformly distributed is, > > PER=1-(1-BER)^N where N is the number of bits. > > However, the above formula is only approximate because in real life > scenarios, the bit errors are not completely independent but may occur > in bursts. Further, the error distribution is also not exactly uniform. > > Hope it helps.... > > Cheers, > Abdul. > > ªL®õ¨¶ wrote: > >> ------------------------------------------------------------------------ >> >> Hi all, how can I transform ¡§Bit error Rate¡¨ to ¡§packet error rate¡¨? >> >> >> >> Is there any formulas for this ? >> >> >> >> Can any body help me? >> >> >> >> >> > > > > > Previous message: [ns] FW: how do i transfrom "Bit Error Rate" to "Packet Error Rate"? Next message: [ns] FW: how do i transfrom "Bit Error Rate" to "frame Error Rate"? Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] More information about the Ns-users mailing list
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