公开(公告)号：DE60000395D1

公开(公告)日：2002-10-10

申请号：DE60000395

申请日：2000-07-17

Applicant: LUCENT TECHNOLOGIES INC

Inventor： KRISHNAMOORTHY RAJEEV ,  LI XIAODONG ,  NARAYANASWAMY SHANKAR ,  RUPP MARKUS ,  VISWANATHAN HARISH

IPC: H04L27/18 ,  H04B7/24 ,  H04L1/00 ,  H04L27/06 ,  H04L27/34

Abstract: In a wireless communication system, the constellation mapping scheme employed may be changed on a per-time-slot basis, i.e., from time slot to time slot, so that the constellation used to encode the symbols of each time slot may be different for each time slot within a single frame and may be different for a particular time slot in different consecutive frames. In other words, several constellation mapping schemes are available, with each providing the ability to transmit a different number of bits per symbol, and the particular constellation mapping scheme employed for any time slot need be selected for that time slot only. The ability to use any particular constellation mapping scheme is dependent on the current channel quality. The particular constellation mapping used for the user data of the time slot may be indicated in the preamble of the time slot. To this end, each time slot may have its own preamble that is mapped with a constellation mapping scheme which is a) known Ù priori, b) may be the same for all time slots, and c) may be different from the constellation mapping scheme used to encode user data in the time slot. A receiver can determine the constellation mapping used for each time slot from solely from the preamble of the time slot.

公开(公告)号：BR0003068A

公开(公告)日：2001-03-13

申请号：BR0003068

申请日：2000-07-21

Applicant: LUCENT TECHNOLOGIES INC

Inventor： KRISHNAMOORTHY RAJEEV ,  VISWANATHAN HARISH ,  LI XIAODONG ,  NARAYANASWAMY SHANKAR ,  RUPP MARKUS

IPC: H04L27/18 ,  H04B7/24 ,  H04L1/00 ,  H04L27/06 ,  H04L27/34

Abstract: In a wireless communication system, the constellation mapping scheme employed may be changed on a per-time-slot basis, i.e., from time slot to time slot, so that the constellation used to encode the symbols of each time slot may be different for each time slot within a single frame and may be different for a particular time slot in different consecutive frames. In other words, several constellation mapping schemes are available, with each providing the ability to transmit a different number of bits per symbol, and the particular constellation mapping scheme employed for any time slot need be selected for that time slot only. The ability to use any particular constellation mapping scheme is dependent on the current channel quality. The particular constellation mapping used for the user data of the time slot may be indicated in the preamble of the time slot. To this end, each time slot may have its own preamble that is mapped with a constellation mapping scheme which is a) known Ù priori, b) may be the same for all time slots, and c) may be different from the constellation mapping scheme used to encode user data in the time slot. A receiver can determine the constellation mapping used for each time slot from solely from the preamble of the time slot.

公开(公告)号：AU4876600A

公开(公告)日：2001-02-01

申请号：AU4876600

申请日：2000-07-21

Applicant: LUCENT TECHNOLOGIES INC

Inventor： KRISHNAMOORTHY RAJEEV ,  LI XIAODONG ,  NARAYANASWAMY SHANKAR ,  RUPP MARKUS ,  VISWANATHAN HARISH

IPC: H04L27/18 ,  H04L1/00 ,  H04L27/04 ,  H04L27/34 ,  H04Q7/36 ,  H04L27/32 ,  H04B7/212

Abstract: In a wireless communication system, the constellation mapping scheme employed may be changed on a per-time-slot basis, i.e., from time slot to time slot, so that the constellation used to encode the symbols of each time slot may be different for each time slot within a single frame and may be different for a particular time slot in different consecutive frames. In other words, several constellation mapping schemes are available, with each providing the ability to transmit a different number of bits per symbol, and the particular constellation mapping scheme employed for any time slot need be selected for that time slot only. The ability to use any particular constellation mapping scheme is dependent on the current channel quality. The particular constellation mapping used for the user data of the time slot may be indicated in the preamble of the time slot. To this end, each time slot may have its own preamble that is mapped with a constellation mapping scheme which is a) known Ù priori, b) may be the same for all time slots, and c) may be different from the constellation mapping scheme used to encode user data in the time slot. A receiver can determine the constellation mapping used for each time slot from solely from the preamble of the time slot.

公开(公告)号：AU4876400A

公开(公告)日：2001-02-01

申请号：AU4876400

申请日：2000-07-21

Applicant: LUCENT TECHNOLOGIES INC

Inventor： KRISHNAMOORTHY RAJEEV ,  LI XIAODONG ,  NARAYANASWAMY SHANKAR ,  RUPP MARKUS ,  VISWANATHAN HARISH

IPC: H04L27/18 ,  H04B7/24 ,  H04L1/00 ,  H04L27/06 ,  H04L27/34 ,  H04J3/22 ,  H04Q7/28

Abstract: In a wireless communication system, the constellation mapping scheme employed may be changed on a per-time-slot basis, i.e., from time slot to time slot, so that the constellation used to encode the symbols of each time slot may be different for each time slot within a single frame and may be different for a particular time slot in different consecutive frames. In other words, several constellation mapping schemes are available, with each providing the ability to transmit a different number of bits per symbol, and the particular constellation mapping scheme employed for any time slot need be selected for that time slot only. The ability to use any particular constellation mapping scheme is dependent on the current channel quality. The particular constellation mapping used for the user data of the time slot may be indicated in the preamble of the time slot. To this end, each time slot may have its own preamble that is mapped with a constellation mapping scheme which is a) known Ù priori, b) may be the same for all time slots, and c) may be different from the constellation mapping scheme used to encode user data in the time slot. A receiver can determine the constellation mapping used for each time slot from solely from the preamble of the time slot.

公开(公告)号：CA2313817A1

公开(公告)日：2001-01-27

申请号：CA2313817

申请日：2000-07-12

Applicant: LUCENT TECHNOLOGIES INC

Inventor： LI XIAODONG ,  VISWANATHAN HARISH ,  RUPP MARKUS ,  NARAYANASWAMY SHANKAR ,  KRISHNAMOORTHY RAJEEV

IPC: H04L27/18 ,  H04L1/00 ,  H04L27/04 ,  H04L27/34 ,  H04Q7/36 ,  H04J3/16

Abstract: In a wireless communication system, the constellation mapping scheme employ ed may be changed on a per-time-slot basis, i.e., from time slot to time slot, so that the constellation used to encode the symbols of each time slot may be different for each time slot within a single frame and may be different for a particular time slot i n different consecutive frames. In other words, several constellation mapping schemes ar e available, with each providing the ability to transmit a different number of bits per symbol, and the particular constellation mapping scheme employed for any time slot need be selected for that time slot only. The ability to use any particular constellation mapping scheme is dependent on the current channel quality. The particular constellation mappi ng used for the user data of the time slot may be indicated in the preamble of the time slot. To this end, each time slot may have its own preamble that is mapped with a constellation mapping scheme which is a) known à priori, b) may be the same for all time slots, and c) may be different from the constellation mapping scheme used to encode user data in the time slot. A receiver can determine the constellation mapping used for each time slot from solely from the preamble of the time slot.