C802.20-04/24

Project / IEEE 802.20 Working Group on Mobile Broadband Wireless Access
Title / Error Rate Requirements in 802.11-1997
Date Submitted / Robert Love
LAN Connect Consultants
7105 Leveret Circle
Raleigh, NC27615
Voice: (919) 848-6773
Email:
Source(s) / 802.11-1997
Re: / Proposed Error rates for 802.20
Abstract / Packet Error Rates for 802.11 provided
Purpose / Use as baseline to establish 802.20 FER requirements or objectives
Notice / The contributor grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution, and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEE’s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE’s sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE 802.20.
Release / The contributor is familiar with IEEE patent policy, as outlined in Section 6.3 of the IEEE-SA Standards Board Operations Manual> and in Understanding Patent Issues During IEEE Standards Development <>.
Patent Policy / The contributor is familiar with IEEE patent policy, as outlined in Section 6.3 of the IEEE-SA Standards Board Operations Manual> and in Understanding Patent Issues During IEEE Standards Development <>.

From Std 802.11-1997

14.6.15.1 Input signal range

The PMD shall be capable of recovering a conformant PMD signal from the medium, as described in related subclauses, with a frame error ratio (FER) 3% for PSDUs of 400 octets generated with pseudorandom data, for receiver input signal levels in the range from -20 dBm to the receiver sensitivity (as specified in 14.6.15.4), across the frequency band of operation.

14.6.15.4 Receiver sensitivity

The sensitivity is defined as the minimum signal level required for an FER of 3% for PSDUs of 400 octets generated with pseudorandom data. The sensitivity shall be less than or equal to -80 dBm. The reference sensitivity is defined as -80 dBm for the 1 Mbit/s FH PHY specifications.

15.4.8.1 Receiver minimum input level sensitivity

The frame error ratio (FER) shall be less than 8 times10-2 at an MPDU length of 1024 bytes for an input level of - 80 dBm measured at the antenna connector. This FER shall be specified for 2 Mbit/s DQPSK modulation. The test for the minimum input level sensitivity shall be conducted with the energy detection threshold set less than or equal to -80 dBm.

15.4.8.2 Receiver maximum input level

The receiver shall provide a maximum FER of 8 times10-2 at an MPDU length of 1024 bytes for a maximum input level of -4 dBm measured at the antenna. This FER shall be specified for 2 Mbit/s DQPSK modulation.

15.4.8.3 Receiver adjacent channel rejection

Adjacent channel rejection is defined between any two channels with ³30 MHz separation in each channel group defined in 15.4.6.2. The adjacent channel rejection shall be equal to or better than 35 dB with an FER of 8x10 -2 using 2 Mbit/s DQPSK modulation described in 15.4.6.4 and an MPDU length of 1024 bytes.

Input a 2 Mbit/s DQPSK modulated signal at a level 6 dB greater than specified in 15.4.8.1. In an adjacent channel (³30 MHz separation as defined by the channel numbering), input a signal modulated in a similar fashion that adheres to the transmit mask specified in 15.4.7.4 to a level 41 dB above the level specified in 15.4.8.1. The adjacent channel signal shall be derived from a separate signal source. It cannot be a frequency shifted version of the reference channel. Under these conditions, the FER shall be no worse than 8x10 -2 .

16.3.4.1 Receiver sensitivity

The receiver sensitivity, defined as the minimum irradiance (in mW/cm 2 ) at the photodetector plane required for a frame error ratio (FER) of 4x10 -5 with a PLCSDU of 512 octets and with an unmodulated background IR source between 800 nm and 1000 nm with a level of 0.1 mW/cm 2 , shall be

1 Mbit/s: 2 ´ 10 -5 mW/cm 2

2 Mbit/s: 8 ´ 10 -5 mW/cm 2

16.3.4.2 Receiver dynamic range

The receiver dynamic range, defined as the ratio between the maximum and minimum irradiance at the plane normal to the receiver axis that assures an FER lower than or equal to 4 x 10 -5 with a PLCSDU of 512 octets and with an unmodulated background IR source between 800 nm and 1000 nm with a level of 0.1 mW/cm 2 , shall be ³30 dB.