Pilot design for long term evolution uplink multi-input multi-output antenna system

Patent metadata

Field	Value
Publication number	US-9294180-B2
Application number	US-89561607-A
Country	US
Kind code	B2
Filing date	Aug 23, 2007
Priority date	Aug 23, 2006
Publication date	Mar 22, 2016
Grant date	Mar 22, 2016

Abstract

A pilot transmission in a multiple antenna closed loop transmission time multiplexes a beam-specific pilot and an antenna-specific pilot in two short blocks of one uplink sub-frame. The beam-specific pilot is transmitted as an in-band pilot with the same beam as data to provide optimal data demodulation/estimation. The antenna-specific pilot is transmitted as an out-band pilot to provide optimal beam selection.

First claim

The invention claimed is:

1. A method, comprising:
multiplexing an in-band pilot and an out-band pilot for providing a pilot transmission in response thereto in a multiple antenna closed loop transmission, and
transmitting the in-band pilot and the out-band pilot in an uplink sub-frame,
wherein said in-band pilot is a beam-specific pilot and said out-band pilot is an antenna-specific pilot, and wherein for beam-specific pilots, pilots are transmitted using the same beam as data transmission, and for antenna-specific pilots, orthogonal pilots are transmitted from multiple antennas.

2. The method as defined in claim 1 further comprising time division multiplexing the in-band pilot in a first short block in the uplink sub-frame and the out-band pilot in a second short block in the uplink sub-frame.

3. The method as defined in claim 1 further comprising combining the in-band pilot and out-band pilot transmissions for frequency domain scheduling with the beam-specific pilot and the antenna-specific pilot.

4. The method as defined in claim 1 wherein the pilot transmission further comprises a long term evolution uplink multi-input multi-output antenna system pilot transmission.

5. A method, comprising:
time multiplexing a beam-specific pilot and an antenna-specific pilot for providing a pilot transmission in a multiple antenna closed loop transmission;
transmitting the beam-specific pilot in a first short block in a sub-frame, and transmitting the antenna-specific pilot in a second short block in said sub-frame;
wherein said beam-specific pilot is an in-band pilot and said antenna-specific pilot is an out-band pilot, wherein for beam-specific pilots, pilots are transmitted using the same beam as data transmission, and for antenna-specific pilots, orthogonal pilots are transmitted from multiple antennas.

6. An apparatus, comprising:
at least one processor;
memory storing a program of instructions;
wherein the memory storing the program of instructions is configured to, with the at least one processor, cause the apparatus to at least:
multiplex an in-band pilot and an out-band pilot into a pilot transmission signal for transmission in a multiple antenna closed loop transmission, and
configure said pilot transmission signal for transmission in an uplink sub-frame,
wherein said in-band pilot is a beam-specific pilot and said out-band pilot is an antenna-specific pilot, and wherein for beam-specific pilots, pilots are transmitted using the same beam as data transmission, and for antenna-specific pilots, orthogonal pilots are transmitted from multiple antennas.

7. The apparatus as defined in claim 6 further configured for time division multiplexing said in-band pilot in a first short block in said uplink sub-frame and said out-band pilot in a second short block of said uplink sub-frame.

8. A mobile station, comprising:
at least one processor;
memory storing a program of instructions;
wherein the memory storing the program of instructions is configured to, with the at least one processor, cause the apparatus to at least:
multiplex an in-band pilot and an out-band pilot into a pilot transmission signal for transmission in a multiple antenna closed loop transmission;
configure said pilot transmission signal for transmission in an uplink sub-frame; and
a transceiver, for transmitting said pilot transmission;
wherein said in-band pilot is a beam-specific pilot and said out-band pilot is an antenna-specific pilot, and wherein for beam-specific pilots, pilots are transmitted using the same beam as data transmission, and for antenna-specific pilots, orthogonal pilots are transmitted from multiple antennas.

9. An application specific integrated circuit configured for operation according to claim 1 .

10. An apparatus, comprising:
a multiplexing means, configured for time division multiplexing an in-band pilot and an out-band pilot for providing a pilot transmission in response thereto in a multiple antenna closed loop transmission; and
a transmitting means, configured for transmitting said in-band pilot in a first short block in an uplink sub-frame and said out-band pilot in a second short block in said uplink sub-frame;
wherein said in-band pilot is a beam-specific pilot and said out-band pilot is an antenna-specific pilot, and wherein for beam-specific pilots, pilots are transmitted using the same beam as data transmission, and for antenna-specific pilots, orthogonal pilots are transmitted from multiple antennas.

11. A non-transitory computer readable medium, execution of which by at least one processor configures an apparatus to at least:
multiplex an in-band pilot and an out-band pilot into a pilot transmission signal for transmission in a multiple antenna closed loop transmission, and
transmit said pilot transmission signal in an uplink sub-frame,
wherein said in-band pilot is a beam-specific pilot and said out-band pilot is an antenna-specific pilot, and wherein for beam-specific pilots, pilots are transmitted using the same beam as data transmission, and for antenna-specific pilots, orthogonal pilots are transmitted from multiple antennas.

Assignees

• Tirkkonen Olav
• Pajukoski Kari
• Kang Jianfeng
• Nokia Technologies Oy

Inventors

• Tirkkonen Olav
• Pajukoski Kari
• Kang Jianfeng

Classifications

• H04L25/0226

  sounding signals per se · CPC title

• H04L5/005

  of common pilots, i.e. pilots destined for multiple users or terminals · CPC title

• H04L5/0051

  of dedicated pilots, i.e. pilots destined for a single user or terminal · CPC title

• H04B7/0634 Primary

  Antenna weights or vector/matrix coefficients · CPC title