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IEEE Std 802.16-2001

LOCAL AND METROPOLITAN AREA NETWORKS—PART 16:

The downlink PHY includes a transmission CS that inserts a pointer byte at the beginning of the payload to help the receiver identify the beginning of a MAC PDU. Data bits coming from the transmission CS are randomized, FEC encoded, and mapped to a QPSK, 16-QAM, or 64-QAM (optional) signal constellation.

The uplink PHY is based upon TDMA burst transmission. Each burst is designed to carry variable-length MAC PDUs. The transmitter randomizes the incoming data, FEC encodes it, and maps the coded bits to a QPSK, 16-QAM (optional), or 64-QAM (optional) constellation.

8.2.2 PHY SAP parameter definitions

This subclause defines the PHY SAP parameters (8.1.3) used in this physical layer specification.

8.2.2.1 SCHED_PARAM_VECTOR

The SCHED_PARAM_VECTOR parameters and values are shown in Table 75.

Table 75—SCHED_PARAM_VECTOR for 10–66 GHz PHY

Parameter

Value

 

 

Symbol Rate

16 to 40 (in Mbaud)

 

 

Modulation density

2, 4, or 6

 

 

FEC block size

0 to 511 bytes

 

 

FEC payload

0 to 255 bytes

 

 

Uplink Preamble length

16 or 32 Symbols

 

 

PHY Overhead

0 to 256 Symbols

 

 

8.2.2.2 DCD_PARAM_VECTOR

The DCD_PARAM_VECTOR parameters and values are shown in Table 76.

Table 76—DCD_PARAM_VECTOR for 10–66 GHz PHY

Parameter

Value

 

 

RF Channel number

0 to maximum number of channels allowed in

 

the system

 

 

Symbol Rate

16 to 40 (in Mbaud)

 

 

Number of active PHY burst profiles

1-13

 

 

Start active region in frame

0-65535 (in symbols)

 

 

End active region in frame

0-65535 (in symbols)

 

 

214

Copyright © 2002 IEEE. All rights reserved.

AIR INTERFACE FOR FIXED BROADBAND WIRELESS ACCESS SYSTEMS

IEEE Std 802.16-2001

8.2.2.3 UCD_PARAM_VEC

The UCD_PARAM_VEC parameters and values are shown in Table 77.

Table 77—UCD_PARAM_VEC for 10–66 GHz PHY

Parameter

Value

 

 

RF Channel number

0 to maximum number of channels allowed in

 

the system

 

 

Symbol Rate

16 to 40 (in Mbaud)

 

 

Number of active PHY burst profiles

3-12

 

 

Start active region in frame

0-65535 (in symbols)

 

 

End active region in frame

0-65535 (in symbols)

 

 

8.2.2.4 RNG_REQ_VECTOR

The RNG_REQ_VECTOR parameters and values are shown in Table 78.

Table 78—RNG_REQ_VECTOR for 10–66 GHz PHY

Parameter

Value

 

 

Frequency change adjustment

(-1000…+1000) (in KHz)

 

 

Time alignment

(-32768…+32767) in quarter symbols

 

 

Power adjust

(-128…+127) number of 0.5 dB

 

 

8.2.2.5 RNG_IND_VECTOR

The RNG_IND_VECTOR parameters and values are shown in Table 79.

Table 79—RNG_IND_VECTOR for 10–66 GHz PHY

Parameter

Value

 

 

Frequency deviation

(-1000…+1000) In KHz

 

 

RSSI

(0 to RSSI_MAX) (in dB)

 

 

Relative symbol time deviation

-16…15 (in quarter symbols)

 

 

Receiver failure

(0-OK, 1-failure)

 

 

Copyright © 2002 IEEE. All rights reserved.

215

IEEE Std 802.16-2001

LOCAL AND METROPOLITAN AREA NETWORKS—PART 16:

8.2.2.6 TXVECTOR

The TXVECTOR parameters and values are shown in Table 80.

Table 80—TXVECTOR for 10–66 GHz PHY

Parameter

Value

 

 

 

Symbol Rate

16 to 40 (in Mbaud)

 

 

 

Burst profile used

0-15

 

 

 

Start transmit in frame

0-65535 (in symbols)

 

 

 

End transmit in frame

0-65535

(in symbols)

 

 

 

Actual number of bytes transmitted

0-65535

(in bytes)

 

 

 

8.2.2.7 TXSTATUS

The TXSTATUS parameters and values are shown in Table 81.

 

Table 81—TXSTATUS for 10–66 GHz PHY

 

 

 

Parameter

 

Value

 

 

 

Overrun

 

(0-65535) in symbols, 0 indicates no-overrun

 

 

 

Underrun

 

(0-65535) in symbols, 0 indicates no-underrun

 

 

 

8.2.2.8 RXVECTOR

The RXVECTOR parameters and values are shown in Table 82.

Table 82—RXVECTOR for 10–66 GHz PHY

Parameter

Value

 

 

 

Symbol Rate

16 to 40 (in Mbaud)

 

 

 

Burst profile used

0-15

 

 

 

Start Receive in frame

0-65535 (in symbols)

 

 

 

End Receive in frame

0-65535

(in symbols)

 

 

 

Actual number of bytes expected

0-65535

(in bytes)

 

 

 

216

Copyright © 2002 IEEE. All rights reserved.

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