Massive MIMO (M-MIMO) support for heterogeneous networks (HetNets)
First Claim
Patent Images
1. An Access Point (AP), comprising:
- a Massive Multiple Input Multiple Output (M-MIMO) antenna array; and
a processor configured to;
generate a first symbol stream comprising user data for a user device;
generate a second symbol stream comprising backhaul information for another AP;
determine a transmit precoder matrix;
pre-code the first symbol stream and the second symbol stream using the transmit precoder matrix to generate a plurality of signals; and
couple the plurality of signals to the M-MIMO antenna array to transmit a first beam for the first symbol stream to the user device and a second beam for the second symbol stream to the another AP,wherein the transmit precoder matrix is determined, based on a concatenated channel formed by concatenating a first channel estimate and a second channel estimate such that the second beam is narrower than the first beam, andwherein a row of zeros is added to either the first channel estimate or the second channel estimate prior to the first channel estimate and the second channel estimate being concatenated to form the concatenated channel.
7 Assignments
0 Petitions
Accused Products
Abstract
Systems and methods for enabling a wireless backhaul network between access points (APs) in a wireless network are provided. In an embodiment, the wireless backhaul network is enabled using a Massive Multiple Input Multiple Output (MIMO) radio access technology (RAT). In another embodiment, the wireless backhaul network is established using the same RAT as used by the APs to serve user devices, and can utilize the same time and frequency resources used for user communication.
7 Citations
29 Claims
-
1. An Access Point (AP), comprising:
-
a Massive Multiple Input Multiple Output (M-MIMO) antenna array; and a processor configured to; generate a first symbol stream comprising user data for a user device; generate a second symbol stream comprising backhaul information for another AP; determine a transmit precoder matrix; pre-code the first symbol stream and the second symbol stream using the transmit precoder matrix to generate a plurality of signals; and couple the plurality of signals to the M-MIMO antenna array to transmit a first beam for the first symbol stream to the user device and a second beam for the second symbol stream to the another AP, wherein the transmit precoder matrix is determined, based on a concatenated channel formed by concatenating a first channel estimate and a second channel estimate such that the second beam is narrower than the first beam, and wherein a row of zeros is added to either the first channel estimate or the second channel estimate prior to the first channel estimate and the second channel estimate being concatenated to form the concatenated channel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A method performed by an Access Point (AP) having a Massive Multiple Input Multiple Output (M-MIMO) antenna array, the method comprising:
-
generating a first symbol stream comprising user data for a user device; generating a second symbol stream comprising backhaul information for another AP; determining a transmit precoder matrix; pre-coding the first symbol stream and the second symbol stream using the transmit precoder matrix to generate a plurality of signals; and coupling the plurality of signals to the M-MIMO antenna array to transmit a first beam for the first symbol stream to the user device and a second beam for the second symbol stream to the another AP, wherein the transmit precoder matrix is determined, based on a concatenated channel formed by concatenating a first channel estimate and a second channel estimate such that the second beam is narrower than the first beam, and wherein a row of zeros is added to either the first channel estimate or the second channel estimate prior to the first channel estimate and the second channel estimate being concatenated to form the concatenated channel. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
-
-
17. A system, comprising:
-
a first Access Point (AP); and a second AP comprising a processor configured to; generate a first symbol stream comprising user data for a user device; generate a second symbol stream comprising backhaul information for the first AP; determine a transmit precoder matrix; pre-code the first symbol stream and the second symbol stream using the transmit precoder matrix to generate a plurality of signals; and couple the plurality of signals to an antenna array to transmit a first beam for the first symbol stream to the user device and a second beam for the second symbol stream, wherein the transmit precoder matrix is determined, based on a concatenated channel formed by concatenating a first channel estimate and a second channel estimate such that the second beam is narrower than the first beam, and wherein a row of zeros is added to either the first channel estimate or the second channel estimate prior to the first channel estimate and the second channel estimate being concatenated to form the concatenated channel. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
-
-
25. An Access Point (AP), comprising:
-
a Massive Multiple Input Multiple Output (M-MIMO) antenna array; and a processor configured to pre-code a first symbol stream and a second symbol stream using a transmit precoder matrix to generate a plurality of signals and couple the plurality of signals to the M-MIMO antenna array to transmit a first beam for the first symbol stream and a second beam for the second symbol stream, wherein the first symbol stream comprises user data for a user device and the second symbol stream comprises backhaul information for another AP, wherein the transmit precoder matrix is determined, based on a concatenated channel formed by concatenating a first channel estimate and a second channel estimate such that the second beam is narrower than the first beam, and wherein a row of zeros is added to either the first channel estimate or the second channel estimate prior to the first channel estimate and the second channel estimate being concatenated to form the concatenated channel. - View Dependent Claims (26, 27, 28, 29)
-
Specification