K. Challapali

3.6k total citations · 2 hit papers
34 papers, 2.4k citations indexed

About

K. Challapali is a scholar working on Computer Networks and Communications, Electrical and Electronic Engineering and Computer Vision and Pattern Recognition. According to data from OpenAlex, K. Challapali has authored 34 papers receiving a total of 2.4k indexed citations (citations by other indexed papers that have themselves been cited), including 18 papers in Computer Networks and Communications, 16 papers in Electrical and Electronic Engineering and 14 papers in Computer Vision and Pattern Recognition. Recurrent topics in K. Challapali's work include Cognitive Radio Networks and Spectrum Sensing (14 papers), Video Coding and Compression Technologies (12 papers) and Advanced Data Compression Techniques (9 papers). K. Challapali is often cited by papers focused on Cognitive Radio Networks and Spectrum Sensing (14 papers), Video Coding and Compression Technologies (12 papers) and Advanced Data Compression Techniques (9 papers). K. Challapali collaborates with scholars based in United States, Finland and United Kingdom. K. Challapali's co-authors include Carlos Cordeiro, Dagnachew Birru, Monisha Ghosh, Sai Shankar N, Sai Shankar N., Jianfeng Wang, Dave Cavalcanti, Chun‐Ting Chou, Zhun Zhong and Jianfeng Wang and has published in prestigious journals such as Proceedings of the IEEE, IEEE Journal on Selected Areas in Communications and IEEE Communications Magazine.

In The Last Decade

K. Challapali

33 papers receiving 2.3k citations

Hit Papers

IEEE 802.22: the first worldwide wireless standard based ... 2005 2026 2012 2019 2005 2006 100 200 300 400 500
What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

  1. IEEE 802.22: the first worldwide wireless standard based on cognitive radios
    2005 540 citations Carlos Cordeiro, K. Challapali et al. profile →
  2. IEEE 802.22: An Introduction to the First Wireless Standard based on Cognitive Radios
    2006 412 citations Carlos Cordeiro, K. Challapali et al. Journal of Communications profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
K. Challapali United States 17 2.2k 1.6k 219 189 116 34 2.4k
Amir Ghasemi Canada 11 3.0k 1.4× 2.1k 1.3× 294 1.3× 287 1.5× 226 1.9× 38 3.1k
Gary J. Minden United States 18 1.6k 0.7× 891 0.6× 110 0.5× 73 0.4× 72 0.6× 66 1.8k
Thomas Keller United Kingdom 19 1.8k 0.8× 2.3k 1.5× 232 1.1× 75 0.4× 88 0.8× 92 2.7k
Harri Holma Finland 16 2.5k 1.1× 2.7k 1.7× 72 0.3× 41 0.2× 130 1.1× 38 2.9k
Beibei Wang United States 6 1.1k 0.5× 849 0.5× 100 0.5× 89 0.5× 97 0.8× 9 1.2k
Liljana Gavrilovska North Macedonia 20 1.1k 0.5× 1.1k 0.7× 103 0.5× 67 0.4× 167 1.4× 164 1.6k
Antti Toskala Finland 17 2.1k 1.0× 2.4k 1.5× 79 0.4× 46 0.2× 179 1.5× 31 2.6k
Keith Nolan Ireland 13 834 0.4× 726 0.5× 194 0.9× 85 0.4× 134 1.2× 26 1.2k
Daniel Willkomm Germany 11 1.3k 0.6× 986 0.6× 63 0.3× 65 0.3× 50 0.4× 25 1.5k
Stefan Geirhofer United States 14 2.2k 1.0× 2.2k 1.4× 87 0.4× 52 0.3× 139 1.2× 28 2.7k

Countries citing papers authored by K. Challapali

Since Specialization
Citations

This map shows the geographic impact of K. Challapali's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by K. Challapali with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites K. Challapali more than expected).

Fields of papers citing papers by K. Challapali

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by K. Challapali. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by K. Challapali. The network helps show where K. Challapali may publish in the future.

Co-authorship network of co-authors of K. Challapali

This figure shows the co-authorship network connecting the top 25 collaborators of K. Challapali. A scholar is included among the top collaborators of K. Challapali based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with K. Challapali. K. Challapali is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Challapali, K., et al.. (2017). A Novel Illuminance Control Strategy for Roadway Lighting Based on Greenshields Macroscopic Traffic Model. IEEE photonics journal. 10(1). 1–11. 13 indexed citations
2.
Wang, Jianfeng, et al.. (2010). Analysis of QoS Provisioning in Cognitive Radio Networks: A Case Study. Wireless Personal Communications. 57(1). 53–71. 8 indexed citations
3.
Wang, Jianfeng, Myung Sun Song, Kyutae Lim, et al.. (2010). First Cognitive Radio Networking Standard for Personal/Portable Devices in TV White Spaces. 1–12. 32 indexed citations
4.
Cavalcanti, Dave, Suman Das, Jianfeng Wang, & K. Challapali. (2008). Cognitive Radio Based Wireless Sensor Networks. 1–6. 69 indexed citations
5.
Ghosh, Monisha, et al.. (2008). Spectrum Sensing Prototype for Sensing ATSC and Wireless Microphone Signals. 1–7. 25 indexed citations
6.
Cordeiro, Carlos & K. Challapali. (2007). C-MAC: A Cognitive MAC Protocol for Multi-Channel Wireless Networks. 147–157. 292 indexed citations
7.
Cordeiro, Carlos, Monisha Ghosh, Dave Cavalcanti, & K. Challapali. (2007). Spectrum Sensing for Dynamic Spectrum Access of TV Bands. 225–233. 96 indexed citations
8.
Cordeiro, Carlos, K. Challapali, Dagnachew Birru, & Sai Shankar N. (2006). IEEE 802.22: An Introduction to the First Wireless Standard based on Cognitive Radios. Journal of Communications. 1(1). 412 indexed citations breakdown →
9.
Cordeiro, Carlos, et al.. (2005). IEEE 802.22: the first worldwide wireless standard based on cognitive radios. 328–337. 540 indexed citations breakdown →
10.
Challapali, K., et al.. (2004). Real-Time Object Segmentation and Coding for Selective-Quality Video Communications. IEEE Transactions on Circuits and Systems for Video Technology. 14(6). 813–824. 4 indexed citations
11.
Challapali, K., Stefan Mangold, & Zhun Zhong. (2004). Spectrum Agile Radio: Detecting Spectrum Opportunities. RWTH Publications (RWTH Aachen). 45 indexed citations
12.
13.
Yan, Yong & K. Challapali. (2003). A novel distortion-quantization model and its application in low bitrate video communications. Proceedings - International Conference on Image Processing. 1. I–81. 4 indexed citations
14.
Challapali, K., et al.. (2000). A system for the automatic extraction of 3-D facial feature points for face model calibration. 3. 223–226 vol.2. 6 indexed citations
15.
Challapali, K., et al.. (1999). Low-cost HD to SD video decoding. IEEE Transactions on Consumer Electronics. 45(3). 874–878. 2 indexed citations
16.
Challapali, K., et al.. (1995). The Grand Alliance system for US HDTV. Proceedings of the IEEE. 83(2). 158–174. 23 indexed citations
17.
Challapali, K., et al.. (1994). Grand alliance MPEG‐2‐based video decoder with parallel processing architecture. International Journal of Imaging Systems and Technology. 5(4). 263–267. 1 indexed citations
18.
Challapali, K., et al.. (1993). Performance analysis of the advanced digital HDTV video coding system. IEEE Transactions on Consumer Electronics. 39(4). 779–788. 1 indexed citations
19.
Ho, Yo‐Sung, et al.. (1992). The digital simulcast AD-HDTV coding system. IEEE Transactions on Consumer Electronics. 38(4). 778–783. 3 indexed citations
20.
Sun, Hao, K. Challapali, & J. Zdepski. (1992). Error concealment in digital simulcast AD-HDTV decoder. IEEE Transactions on Consumer Electronics. 38(3). 108–118. 50 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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2026