公开(公告)号：JPH11150755A

公开(公告)日：1999-06-02

申请号：JP22734098

申请日：1998-08-11

Applicant: LUCENT TECHNOLOGIES INC

Inventor： HALEEM MOHAMED ABDUL ,  CHIH-LIN I

IPC: H04W16/10 ,  H04W16/14 ,  H04Q7/36 ,  H04L12/28 ,  H04Q7/22 ,  H04Q7/24 ,  H04Q7/26 ,  H04Q7/30

Abstract: PROBLEM TO BE SOLVED: To avoid mutual interference between short distance wireless application (indoor) and outdoor mobile application by specifying prescribed numbers of channels excluded from the micro cell of a high-order system. SOLUTION: The prescribed numbers of channels are excluded from the micro cell of the high-order system to superimpose on the cell of a low-order system and the channels are allocated to the low-order system or scanned and caught by an independent low-order system. The channels to be excluded are regularly selected so as to satisfy deterministically one of the following conditions: satisfying both of condition group expressions I and II, not satisfying the expression I but satisfying the expression II and not satisfying the expression II but satisfying the expression I. In the expression I, Nmin is the minimum number of channels usable for the low-order system, P is a set consisting of cells which have the possibility to interfere with the low-order system, and Ei is a set consisting of channels to be excluded from a micro cell (i). In the expression II, ϕ is an empty set and Ω is a set consisting of micro cells belonging to a normal cluster.

公开(公告)号：JPH11136746A

公开(公告)日：1999-05-21

申请号：JP22733998

申请日：1998-08-11

Applicant: LUCENT TECHNOLOGIES INC

Inventor： HALEEM MOHAMED ABDUL ,  CHIH-LIN I

IPC: H04W16/10 ,  H04W16/14 ,  H04Q7/36 ,  H04Q7/22 ,  H04Q7/24 ,  H04Q7/26 ,  H04Q7/30

Abstract: PROBLEM TO BE SOLVED: To avoid mutual interference between a short distance wireless application and an outdoor mobile application by diffusively selecting the prescribed number of channels which are removed at random in more than one macro cells of a high-order system with a specified condition. SOLUTION: The prescribed number of channels are removed from more than one macro cells in the high-order system, which are overlapped with more than one cells in a low-order system. Thus, the removed channel is allocated to an autonomous low-order system or the channels are scanned and acquired by the low-order system. The prescribed number of channels which are removed are diffusively selected at random in more than one macro cells of the high- order system so that they statistically satisfy the condition of a formula I and a formula II. In the formula I, P is an arbitrary set constituted of three adjacent cells. In the formula II, ϕ an idle set and Ω is the set constituted of the cells belonging to a normal raster.

公开(公告)号：JPH10327126A

公开(公告)日：1998-12-08

申请号：JP11641298

申请日：1998-04-27

Applicant: LUCENT TECHNOLOGIES INC

Inventor： HUANG HOWARD C ,  CHIH-LIN I ,  TEN BRINK STEPHAN ,  VANNUCCI GIOVANNI

IPC: H04B1/707 ,  H04B7/26 ,  H04L7/00 ,  H04J13/04

Abstract: PROBLEM TO BE SOLVED: To improve performance by preventing interference to a multipath caused by a pilot signal by removing the pilot signal of multipath component, which causes the interference of base band received signal, by reconstituting it as prescribed and adding/subtracting that signal later. SOLUTION: A signal r0 of path 0 and a signal r1 of path 1 in received decoding signals r(n) are respectively processed by an on-time selector circuit OTS and inputted to RAKE fingers 603 and 604 later. In this case, pilot reconstitution circuits 606 and 607 are reconstituting pilot signals through predicted attenuation, phase and path delay are respectively added to the fingers 603 and 604, the pilot signal from the path 0 is reconstituted, subtracted from the signal of path 1 by an adder 609 and removed. Similarly, the pilot signal reconstituted from the path 1 is subtracted from the signal of path 0 by an adder circuit 608 and removed and afterwards, the signals are respectively exactly demodulated by fingers 0 and 1 and bit-determined or processed by a viterbi decoder 605.

公开(公告)号：JPH10322312A

公开(公告)日：1998-12-04

申请号：JP11854198

申请日：1998-04-28

Applicant: LUCENT TECHNOLOGIES INC

Inventor： HUANG HOWARD C ,  CHIH-LIN I

IPC: H04B1/709 ,  H04B1/7105 ,  H04B1/7107 ,  H04B1/7115 ,  H04B7/26 ,  H04L7/00 ,  H04J13/04

Abstract: PROBLEM TO BE SOLVED: To provide a receiver using a pilot interference removal device by permitting an MC-CDMA receiver to receive a complex amplitude modulation replica delayed by the time of a transmitted CDMA signal, forming a multi-path delay prediction value, demodulating a multi-path component, combining results, controlling interference caused by other data and generating a desired demodulation data signal. SOLUTION: This MC-CDMA receiver 103 having a partial de-correlator receives a multi-path coherent radio frequency signal through an antenna 121. Multi-path signals are down-converted by modulators 122 and 123 by using the radio frequency signals. The outputs of the modulators 122 and 123 are filter-processed by anti-aliasing low pass filters LPF 124 and 125, and the I signal and the Q signal of the base band are generated. They, are processed by an MC-CDMA rake receiver 128 and a digital signal processor DSP 129 and an output data signal 130 is generated.

公开(公告)号：JPH09186646A

公开(公告)日：1997-07-15

申请号：JP28128696

申请日：1996-10-03

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CHIH-LIN I ,  SANJIV NANDA

IPC: H04J13/04 ,  H04B7/26 ,  H04L12/28 ,  H04L12/56 ,  H04W16/14 ,  H04W28/22 ,  H04W36/18 ,  H04W72/08 ,  H04W74/00

Abstract: PROBLEM TO BE SOLVED: To provide a CDMA(code division multiple access) system providing a load and interference based on demand assignment service. SOLUTION: A mobile station requesting speed more than base data speed transmits pilot strength information concerning the base station of a self cell or an adjacent cell. The pilot strength data decides data speed assigned to the mobile station. When pilot strength information has prescribed relation with a threshold value, increase data speed is assigned. In another execution example, a series of threshold levels are used and the respective threshold levels has relation with different permission data speed. Data speed which satisfies the interference condition of the whole adjacent cells is decided by pilot strength information. In another execution example, increase data speed being proper to the mobile station requesting speed increase is assigned through the use of pilot strength data which is received together with an average adjacent cell ability load in place of the threshold level.