Zobrazeno 1 - 10
of 419
pro vyhledávání: '"Gerhard Kramer"'
Autor:
Gerhard Kramer
Publikováno v:
Entropy, Vol 25, Iss 5, p 728 (2023)
Generalized mutual information (GMI) is used to compute achievable rates for fading channels with various types of channel state information at the transmitter (CSIT) and receiver (CSIR). The GMI is based on variations of auxiliary channel models wit
Externí odkaz:
https://doaj.org/article/84df369da606485ebdc8572aef5bd698
Publikováno v:
Entropy, Vol 25, Iss 3, p 445 (2023)
In the original publication [...]
Externí odkaz:
https://doaj.org/article/b047bdde20d5494bbf3d3be6b8904f2f
Publikováno v:
EURASIP Journal on Wireless Communications and Networking, Vol 2020, Iss 1, Pp 1-12 (2020)
Abstract The performance of centralized and distributed massive MIMO deployments are studied for simulated indoor office scenarios. The distributed deployments use one of the following precoding methods: (1) local precoding with local channel state i
Externí odkaz:
https://doaj.org/article/359cd934879541f38b0dbfff15be098c
Publikováno v:
Entropy, Vol 24, Iss 4, p 504 (2022)
Downlink precoding is considered for multi-path multi-input single-output channels where the base station uses orthogonal frequency-division multiplexing and low-resolution signaling. A quantized coordinate minimization (QCM) algorithm is proposed an
Externí odkaz:
https://doaj.org/article/401c242920d4464cb4b1e71694367b12
Publikováno v:
Entropy, Vol 22, Iss 12, p 1364 (2020)
A new class of convolutional codes, called skew convolutional codes, that extends the class of classical fixed convolutional codes, is proposed. Skew convolutional codes can be represented as periodic time-varying convolutional codes but have a descr
Externí odkaz:
https://doaj.org/article/83048d9634074e8ea3193a5415cd121d
Autor:
Mohit Thakur, Gerhard Kramer
Publikováno v:
Entropy, Vol 21, Iss 2, p 109 (2019)
Standard upper and lower bounds on the capacity of relay channels are cut-set (CS), decode-forward (DF), and quantize-forward (QF) rates. For real additive white Gaussian noise (AWGN) multicast relay channels with one source node and one relay node,
Externí odkaz:
https://doaj.org/article/2ec3d1a196154897997726bd11252abb
Publikováno v:
Entropy, Vol 14, Iss 10, Pp 1813-1828 (2012)
An achievable rate region for line networks with edge and node capacity constraints and broadcast channels (BCs) is derived. The region is shown to be the capacity region if the BCs are orthogonal, deterministic, physically degraded, or packet erasur
Externí odkaz:
https://doaj.org/article/af8496283bb64355bfaaa3824fb33a1d
Autor:
Onur Günlü, Tasnad Kernetzky, Onurcan İşcan, Vladimir Sidorenko, Gerhard Kramer, Rafael F. Schaefer
Publikováno v:
Entropy, Vol 20, Iss 5, p 340 (2018)
Different transforms used in binding a secret key to correlated physical-identifier outputs are compared. Decorrelation efficiency is the metric used to determine transforms that give highly-uncorrelated outputs. Scalar quantizers are applied to tran
Externí odkaz:
https://doaj.org/article/c3c20474457c4e02bf7f8258ab383ae9
Publikováno v:
Entropy, Vol 19, Iss 11, p 610 (2017)
The downlink of symmetric Cloud Radio Access Networks (C-RANs) with multiple relays and a single receiver is studied. Lower and upper bounds are derived on the capacity. The lower bound is achieved by Marton’s coding, which facilitates dependence a
Externí odkaz:
https://doaj.org/article/acb6af185f8744789d8a66147712ce65
Publikováno v:
EURASIP Journal on Wireless Communications and Networking, Vol 2009 (2009)
This paper considers the compound wiretap channel, which generalizes Wyner's wiretap model to allow the channels to the (legitimate) receiver and to the eavesdropper to take a number of possible states. No matter which states occur, the transmitter g
Externí odkaz:
https://doaj.org/article/2a15e790a24f486ba591c67cc745f508